Talmudology for Sukkot~ Take Two Etrogim, and Call Me in the Morning; The Citron as Medicine

The Midrash tells a story of a man who was so generous with his charitable donations that he had no money left to feed his own family. Out of ideas, he did what I suppose anyone in his position would have done. He went to gather up discarded etrogim [the citron taken as part of the four species on the Festival of Sukkot] and went to see a king.

ויקרא רבה לו:ה

, וְנִתְבַּיֵּישׁ לֵילֵךְ לְבֵיתוֹ הָלַךְ לוֹ לְבֵית הַכְּנֶסֶת, חָמָא תַּמָּן מִן אִלֵּין אֶתְרוֹגַיָא דְּמֵינוּקַיָא מְקַלְקְלֵי בְּיוֹם הוֹשַׁעְנָא, וּתְנִינַן תַּמָּן מִיָּד הַתִּינוֹקוֹת שׁוֹמְטִין לוּלָבֵיהֶן וְאוֹכְלִים אֶתְרוֹגֵיהֶם, נְסַב מִנְּהוֹן וּמְלָא יָת סַקָּא וְהָלַךְ לִפְרשׁ בַּיָּם הַגָּדוֹל, עַד שֶׁהִגִּיעַ לִמְדִינַת הַמֶּלֶךְ, כֵּיוָן שֶׁהִגִּיעַ שָׁם אַרָעַת שַׁעְתָּא וְאִשְׁתְּכַח מַלְכָּא חָשֵׁשׁ מֵעוֹי, אָמְרִין לֵיהּ בְּחֶלְמָא אַסְוָתָךְ אֱכֹל מִן אִלֵּין אֶתְרוֹגִין דִּיהוּדָאי מַצְלִין עִמְּהוֹן בְּיוֹם הוֹשַׁעְנָא וְאַתְּ מִתְּסֵי, פִּשְׁפְּשִׁין בְּהַהוּא שַׁעְתָּא לְכָל אִלְפַיָא וּלְכָל מְדִינְתָּא וְלָא אַשְׁכְּחוּן, אָזְלִין וְאַשְׁכְּחוּן לְהַהוּא גַבְרָא יָתֵיב עַל סַקָּא, אָמְרִין לֵיהּ אִית גַּבָּךְ כְּלוּם, אֲמַר לָהֶם גְּבַר מִסְכֵּן אֲנָא וְלֵית גַּבִּי כְּלוּם לִמְזַבְּנָא, פִּשְׁפְּשׁוּ בְּסַקָּא וְאַשְׁכְּחוּן מִן אִלֵּין אֶתְרוֹגִין, וַאֲמָרִין לֵיהּ אִלֵּין מָה הֵן, אֲמַר לוֹן מִן אִלֵּין דִּיהוּדָאי מַצְלֵי בְּיוֹם הוֹשַׁעְנָא, אַטְעָנוּן סַקָּא וְאַעֲלוּהָ קֳדָם מַלְכָּא, אָכַל מַלְכָּא אִלֵּין אֶתְרוֹגַיָיא וְאִתְּסֵי. פַּנּוּן שַׂקָּא וּמְלָאוּהָ דִינָרִין…

…He was ashamed to go to his home. He went to the synagogue and saw there some of the citrons that the children away... He took some of them and filled a sack, and embarked on a voyage in the Mediterranean Sea until he reached the province of the king. When he arrived there, it happened to be that the king had an intestinal illness. They said to him in a dream: ‘Your cure is to eat from those citrons with which the Jews pray on the day of the hoshana, and you will be cured.’ At that time, they searched all the ships and all the provinces, but could not find any. They went and found that man sitting on the sack. They said to him: ‘Do you have anything?’ He said to them: ‘I am a poor man and I have nothing to sell.’ They searched the sack and found those citrons. They said to him: ‘What are they?’ He said to them: ‘From those with which the Jews pray on the day of the hoshana.’ They loaded the sack and took it in before the king. The king ate those citrons and he was cured. They emptied the sack and filled it with dinars..

The etrog as medicine? Yes. People once believed, and many still believe today, that the etrog has medicinal uses. So in honor of Sukkot, let’s talk about some of them.

The Etrog in Ma’aseh Tuviah

The etrog as a medicine appears in one of the first Jewish encyclopedias, written by Tuviah Hacohen. He studied in a yeshivah in Cracow, and at the age of twenty-six, entered the University of Frankfurt, where he began to study medicine. Despite being taken under the wing of Fredrick William, the elector of Brandenburg, and receiving a stipend from him, anti-Jewish sentiment prevented Tuviah from graduating. As a result, he left for the University of Padua, where he graduated with a degree in medicine in 1683 and soon found employment as a physician in Turkey. He published his only work, Ma’aseh Tuviah (The Work of Tuviah), in Venice in 1708 and moved in 1715 to Jerusalem, where he died in 1729.

Tuviah Cohen has long been a favorite of historians of science and Judaism. Perhaps this is because he was a reformer of sorts, ready to sweep away old superstitions and replace them with scientific knowledge. Perhaps it is because his book, Ma’aseh Tuviah, was “ ... the best-illustrated Hebrew medical work of the pre-modern era,” full of wonderful drawings about astronomy and anatomy. Perhaps it is because his book is so clearly printed and a pleasure to read in the original. Or perhaps it is because Cohen was so adamantly opposed to Copernicus that he called him the “Firstborn of Satan”—which made his the first Hebrew work to attack Copernicus and his heliocentric system.

In any event, Tuviah wrote about the wonderful healing properties of the etrog.

Ma'aseh Tuviah, Venice 1708, 146a.

Because in homes that have abundant medicines they also have the five special fruits through with the Land of Israel was blessed, I will write in praise of the of etrog [פרי עץ הדר] which is more beautiful than any other fruit…. both the peel and the fruit itself are delicious to eat, and it also has many wonderful properties [סגולות נפלאות]. The peel alleviates all internal pain and strengthens the muscles. while the white of the fruit strengthens the internal organs. Its bitter taste is good for the liver, and cures thirst. The seeds are also good for internal pain as an an aid for digestion…it is as good as theriac for any person who is ill, and it is particularly beneficial for children with viral infections [ויראוליס] like smallpox. The wood of the tree itself does not have these qualities though without doubt it imparts them to the fruit, which is why the fruit never falls far from the tree [התפוח אינו נופל רחוק מן העץ]. And so if there is a scarcity of the fruit, cut some wood from the etrog tree and boil. It will strengthen the body and a serve to heal the soul.

The Etrog as a Cure for Cholera

We have had occasion in the past to talk about Hayyim Palagi (there are many different ways to spell his last name, 1788– 1868) who was a rabbi and leader of the Jewish community in Izmir (Smyrna), Turkey, though his influence was felt far beyond. Writing about the 1865 cholera outbreak in Turkey, Rabbi Palagi recalled how the Jews had fled Izmir.

In our town of Izmir in 5625 [= 1865] there was an outbreak of cholera, just like the outbreak of 5592 [= 1832] and many fled. The few who remained in the town were expelled by the mayor on the advice of physicians, and left for a nearby mountainside where men, women and children camped, and remained for about three weeks. There was not a single case of cholera the entire time,and the outbreak in the town eventually ended. During that time, I was particular with my prayers, and I prayed to God in the merit of Abraham who was called “a mountain” . . . that the merit of our ancestors would protect us and that we would not fall ill. And so it was. Praise be to God, for his loving kindness endures forever.

I am lucky to own a copy of one of his many works, called Refuah Vehayyim, published in Izmir in 1874. (It even contains three handwritten annotations in the margins written by Rabbi Palagi’s youngest son Yosef.) And here is what you can find on page 12b (though alas, there are no marginalia).

Sefer Refuah Vehayyim, Izmir 1874. 12b. (Chapter 4 #2).

It is written in the name of our teacher Rabbi Hayyim Vital, that to cure cholera take distilled water and the resin of the (?) mastic tree…and take half a cup of the size used for kiddush…and boil it with the resin and give it to the patient. And this is guaranteed.

And it is writtn in the Sefer Otzar Hayyim that this works with etrog peel…

Later in the book, Rabbi Palagi wrote that the etrog can be used for stomach aches in general, and not just those associated with cholera. However, it cannot be any old citron; it must be an etrog used for the mitzvah of lulav and etrog on Sukkot:

Sefer Refuah Vehayyim, Izmir 1874. 51b

For a stomach ache: the remedy is to eat etrogim with were used for the mitzvah of lulav and etrog during the holiday and through Hoshanah Rabbah. For they are used in prayer, and they heal…sometimes they are hard to digest, in which case they should be peeled and then boiled, and then that water should be drunk.

But wait - there’s more

In another of his many books Mo’ed Lekol Chai, Rabbi Palagi recommended the etrog as a means for easing the pains and dangers of childbirth. He cited another work in which this suggestion appeared, though in a slightly different and shorter form. (That work is Nazir Shimshon, published by Ya’akov Shimshon Shabtai Sinigaliah in Pisa in 1783. It is on page 38.)

When a women is pregnant, she should take the etrog on Hosha’ana Rabbah and afer removed the pittom [style] she should distribute charity to the poor each according to her means, and she should pray that God should should save her and that her child should be born healthy.

The reason for this is that there is an opinion that the Tree of Knowledge was an etrog, and when Eve ate from it, Death came into the world. We know that many women die during childbirth, and therefore they should undertake this ritual and say the following prayer:

Master of the Universe, you know that because Chava [Eve] ate from the Tree of Knowledge she sinned and brought Death to the world as well as the pains of childbirth. Had I been there at that time I would not have eaten from it and I would not have benefitted from it in any way, just as I did not want to blemish the etrog during the Festival [of Sukkot] But now I have blemished it, because now it is no longer a mitzvah to take it. I would never want to disobey your mitzvot. Please accept my prayer and my supplication that I should not die as a result of this child or as a result of childbirth. Save me, grant me an easy labor without pain or hardship and let no harm befall me or my child, for you are the God who saves…

And so any man whose woman whose wife is pregnant during Sukkot should arrange for her to take the etrog and give it to his wife and she should follow this procedure. She should say this prayer word for word and conclude by saying “let this infant bring contentment and not pain, and may it be born to a good and peaceful life. Amen.”

Hayyim Pilagi, Mo'ed Lekol Chai Jerusalem 1976 #25.

The Etrog increases Male potency

The etrog. It’s not just for women. In the anonymous collection of segulot called Sefer Refuot published in Vienna in 1926, we find the following recommendation:

Sefer Refuot, Vienna 1926

For increased virility, take four drahms of the tongue of an ox together with half a handful of etrog peel and half a drahm of girofilo

Good to know.

Not so Fast - Chaim Bachrach and his objection

Rabbi Yair Hayyim Bachrach (1638-1702) better known by his famous work the Chavot Yair, was a leading posek of his generation, and led the communities of Worms and Mainz. In his commentary on the Tur (הלכות לולב #664) he also noted the custom of pregnant women biting off the pitum of the etrog, and he was not happy about it. Not at all.

Jewish Etrogs, and Greek Etrogs

The belief in the medicinal properties of the etrog was not unique to our ancestors alone. The Greeks believed it too. In fact, it was they who gave the fruit we know as an etrog a name that reflects just this; they called it Citrus Medica, “the medical citrus" and that is the Latin name of the species to this day. Citrus Medica.

Gaius Plinius Secundus (AD 23/24–79) better known as Pliny the Elder held the cirton tree in very high esteem as demonstrated by this passage in his Natural History (Book XII chapter 7):

The citron tree, called the Assyrian, and by some the Median apple, is an antidote against poisons. The leaf is similar to that of the arbute, except that it has small prickles running across it. As to the fruit, it is never eaten, but it is remarkable for its extremely powerful smell, which is the case, also, with the leaves; indeed, the odour is so strong, that it will penetrate clothes, when they are once impregnated with it, and hence it is very useful in repelling the attacks of noxious insects. The tree bears fruit at all seasons of the year; while some is falling off, other fruit is ripening, and other, again, just bursting into birth. Various nations have attempted to naturalize this tree among them, for the sake of its medical properties, by planting it in pots of clay, with holes drilled in them, for the purpose of introducing the air to the roots;

The Chinese Etrog

To this day, the etrog is used as a medicine in China. They grow several different varieties including the world’s largest citrus, the “Ning’er Giant. And, as the photo below shows, it really is giant.

It is the custom of pregnant women to bite off the tip of the etrog and it is mentioned in the Tzenah Urenah.How fortunate we are that this custom has been utterly uprooted.

 

“Ning’er Giant” citron weighing about 17lb (8kg), held in the gentle hands of the farmer who grew it, Li Hua Zhong, near Ning’er Yunan. (Photo credit David Karp, 18 October 2011.)

 

Some varieties are grown for their antioxidant properties, while others release insulin, which may be of use in Type II diabetes. In fact, according to a 2012 Review on Phytochemical and Pharmacological Properties of Citrus medica Linn, the etrog will cure just about anything.

Result shows that Citrus medica Linn. possesses analgesic, hypoglycaemic, anticholinesterase, anticancer, antidiabetic, hypocholesterolemic, hypolipidemic, insulin Secretagogue, anthelmintic, antimicrobial antiulcer and estrogenic properties.

And presumably, all without any side effects! The Jinguu variety from southern Yunnan is used to treat respiratory disorders, whereas the Qingpi variety, grown in the Provinces of Zhejiang and Jianxi is used for its more general medicinal effects.

Citrus Fruits and the First Randomized controlled Medical Trial

The citrus (but not the etrog, sadly) made a surprising appearance in the first randomized controlled clinical trial that humanity conducted. In the 18th century, sailors in the British Navy, went without fresh fruit for long periods of time. Citrus fruits contain the essential Vitamin C also known as ascorbic acid. Without it you develop a very nasty disease called scurvy. There is lethargy, the hair and teeth fall out, the gums bleed spontaneously, and bruising appears. Without treatment, you die. So yes, it is very nasty.

Sailors were often at sea for months at a time, without access to fruit containing Vitamin C. In the 18th century, it is estimated that more British sailors died from scurvy than died in battle.

For reasons we won’t go into here, a Scottish naval Surgeon named James Lind (1716-1794) had a hunch that the disease was cured by a lack of whatever it was that citrus fruits contained. So he took 12 sailors with scurvy and fed them various experimental diets that included one enriched with oranges and lemons (but not etrogs), and compared them to a similar group of sailors who ate a regular Royal Navy diet. The results were startling.

On the 20th of May 1747, I selected twelve patients in the scurvy, on board the Salisbury at sea. Their cases were as similar as I could have them. They all in general had putrid gums, the spots and lassitude, with weakness of the knees. They lay together in one place, being a proper apartment for the sick in the fore-hold; and had one diet common to all, viz. water gruel sweetened with sugar in the morning; fresh mutton-broth often times for dinner; at other times light puddings, boiled biscuit with sugar, etc., and for supper, barley and raisins, rice and currants, sago and wine or the like. Two were ordered each a quart of cyder a day. Two others took twenty-five drops of elixir vitriol three times a day … Two others took two spoonfuls of vinegar three times a day … Two of the worst patients were put on a course of sea-water … Two others had each two oranges and one lemon given them every day … The two remaining patients, took … an electary recommended by a hospital surgeon … The consequence was, that the most sudden and visible good effects were perceived from the use of oranges and lemons; one of those who had taken them, being at the end of six days fit for duty … The other was the best recovered of any in his condition; and … was appointed to attend the rest of the sick. Next to the oranges, I thought the cyder had the best effects…

The most sudden and visible good effects were perceived from the use of oranges and lemons; one of those who had taken them being at the end of six days fit for duty … The other was the best recovered of any in his condition; and being now deemed pretty well, was appointed nurse to the rest of the sick.

Lind demonstrated that citrus fruits prevented and cured scurvy, and the first randomized controlled clinical trial, now the gold standard for evaluating new drugs, was born. Even Rabbi Bachrach would not have objected to that.

The etrog, whose Latin name means a medicine, has long been a symbol of healing, not only in our own tradition, but in others, often just as ancient. How fitting that we take it this year, a year of pain and sorrow for the Jewish People, and pray for the release of our bothers and sisters in captivity, the safety of our soldiers, and a speedy end to this most terrible and most just of wars. We all need some healing.

עד הניצחון

אַחֵינוּ כָּל בֵּית יִשְׂרָאֵל

הַנְּתוּנִים בַּצָּרָה וּבַשִּׁבְיָה

הָעוֹמְדִים בֵּין בַּיָּם וּבֵין בַּיַּבָּשָׁה

הַמָּקוֹם יְרַחֵם עֲלֵיהֶם

וְיוֹצִיאֵם מִצָּרָה לִרְוָחָה

וּמֵאֲפֵלָה לְאוֹרָה

וּמִשִּׁעְבּוּד לִגְאֻלָּה

הָשָׁתָא בַּעֲגָלָא וּבִזְמַן קָרִיב

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Bava Basra 110a ~ Uncles and Nephews

בבא בתרא קי, א

אמר רבא הנושא אשה צריך שיבדוק באחיה ... תנא רוב בנים דומין לאחי האם

Ravah said: If a man wants to marry a women he should examine the character of her brothers...It was taught in a Baraita: Most sons resemble their maternal uncles.

In today's page of Talmud we continue a discussion of the rights of inheritance, which evolves into a discussion of the influence that ancestors have over their descendents.  The Baraita (a collection of teachings from the era of the Mishnah)  cited in support of Ravah's advice notes that not all sons resemble their maternal uncles, but most do.

Shared Genetic Material

The amount of material we share with our relatives varies by the relationship.  Only identical twins share all of their genetic material.  We share 50% of our genes with each of our parents, and 50% with each of our siblings.  But as you can see below, we share only 25% of our genetic material with our uncles or aunts - the same amount we share with our grandparents.

Image from here.

Image from here.

The amount of genetic material we share with our uncles or aunts does not vary with whether they are on our maternal or paternal side. A boy will no more genetically resemble his maternal uncle than they will his paternal uncle.  And for girls, the rule is the same regarding their aunts.

We find this statement repeated in the Jerusalem Talmud, where it appears as part of a lengthy list originally stated by Abba Shaul:

תלמוד ירושלמי קידושין פרק ד

אבא אוריין איש צדיין אומר משום אבא שאול כו'. רוב חמרים רשעים. רוב גמלין כשירין. רוב ספנים חסידים. רוב ממזירין פקחין. רוב עבדים נאים. רוב בני אבות בויישנים. רוב בנים דומין לאחי האם כשר שברופאים לגיהנם. הכשר שבטבחין שותף עמלק

Most donkey drivers are evildoers, most camel drivers are upright, most sailors are pious, most Mamzerim are cunning, most slaves are haughty, most people of fine genealogy are embarrassed [to take from the public charity fund], most sons are like their uncles [i.e. their mother's brothers], the best doctors go to hell; the best butcher is a partner of Amalek... 

When understood in this context, the connection between uncles and nephews is nothing more than a pithy generalization, and about as likely to be correct as the others on the list.  Like all talmudic aphorisms, it was uttered in a different time and place from our own. If you really want to know who your child will resemble, you should look no further than you and your spouse.  That will be the most likely predictor of your child's character, whether genetically encoded or socially constructed.  

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Yoma 20b ~ From The Talmudology Yom Kippur Archives: Sound Propagation at Night

Tomorrow evening (or in a few hours if you are in Australia) we observe Yom Kippur, the Day of Atonement. So we will reach into the Talmudology archives to a post that discussed the propagation of sound at night.

In discussing the service on Yom Kippur, the holiest day of the Jewish Year, the Talmud notes that the voice of the Cohen Gadol, the High Priest, could be heard from a distance of ten parsangs. In case you were wondering, a parsang is an old Persian measure, and is about 3 miles or almost 5km. This means that the voice of the High Priest could be heard over 30 miles away! The Talmud notes that it could be heard at this distance even during the day, when sound does not travel as far as it does at night. Here it is, in the original:

שקלים כ,א

דְּאָמַר מָר: וּכְבָר אָמַר ״אָנָא הַשֵּׁם״ וְנִשְׁמַע קוֹלוֹ בִּירִיחוֹ. וְאָמַר רַבָּה בַּר בַּר חָנָה אָמַר רַבִּי יוֹחָנָן: מִירוּשָׁלַיִם לִירִיחוֹ עֲשַׂר פַּרְסֵי

וְאַף עַל גַּב דְּהָכָא אִיכָּא חוּלְשָׁא, וְהָכָא לֵיכָּא חוּלְשָׁא. וְהָכָא יְמָמָא, וְהָתָם לֵילְיָא

דְּאָמַר רַבִּי לֵוִי: מִפְּנֵי מָה אֵין קוֹלוֹ שֶׁל אָדָם נִשְׁמָע בַּיּוֹם כְּדֶרֶךְ שֶׁנִּשְׁמָע בַּלַּיְלָה? מִפְּנֵי גַּלְגַּל חַמָּה שֶׁמְּנַסֵּר בָּרָקִיעַ כְּחָרָשׁ הַמְנַסֵּר בַּאֲרָזִים

There already was an incident where the High Priest recited, in his confession that accompanied the placing of hands on his bull on Yom Kippur: Please God, and his voice was heard in Jericho. And Rabba bar bar Chana said that Rabbi Yochanan said: The distance from Jerusalem to Jericho is ten parasangs.

…here it was during the day, when sound does not travel as well, that the High Priest recited his confession… As Rabbi Levi said: Why is a person’s voice not heard during the day in the manner that it is during the night? It is due to the fact that the sound of the sphere of the sun traversing the sky generates noise like the noise generated by a carpenter sawing cedars, and that noise drowns out other sounds…

As we approach Yom Kippur, we might ask if this is true? Does sound really travel further at night? And if so, why?

Yes. It is true

Rabbi Levi is correct. Sound does indeed travel further at night, as you can see below in this helpful graphic. (For the man with the trumpet, think Cohen Gadol. For the dog, think Jericho.)

From here.

The first thing to know is that the speed of sound is dependent on the temperature of the air. Sound moves quicker in warm air and slower in cold air. During the day the sun heats up the earth’s surface, and in particular it heats up the air that is closest to the ground, which is where the sound travels the fastest. But a heat gradient bends the sound waves upwards, much in the same way that a lens bends light rays. (The gradient in which atmospheric temperature decreases with elevation by an amount known as the adiabatic lapse rate.) As a result, the sound waves travels up and away from the listener, and the sounds are quieter.

The reverse happens at night. At night the ground cools quickly. The higher air is warmer than the air close to the ground. The sound further from the ground travels faster at night causing the sound wave to refract back towards the earth. The listener now hears them as louder than they were during the day. It’s physics! (Though it should be noted that some physicists dispute this explanation.)

It’s not just sound waves

Why radio waves travel further at night. From here.

Here’s a fact that Rabbi Levi did not know. It’s not just sound that is heard better at night. Radio waves are heard better at night too, though for an entirely different reason. To be precise, this does not happen with all radio waves, but just those on the AM and short wave frequencies. Because radio waves only travel in straight lines, they do not follow the curvature of the earth’s surface, and so have a natural range of only 30-40 miles. But they can be transmitted up to the ionosphere, where they bounce off of it and down, back to earth. At night, that ionosphere is protected from the electromagnetic radiation that streams from the sun and tends to distort it. And so the radio waves are reflected back down with less interference, which means they travel further and are easier to detect. As a result, some distant AM radio stations (remember those?) can only be heard at night, though the whole thing becomes rather a moot point since nearly everything broadcast can now be found on the internet, for which the ionosphere is not needed.

Noise pollution

We have demonstrated that sound travels further at night, using our knowledge of the properties of sound waves and the phenomenon of refraction. Rabbi Levi knew none of this, but he had something that very few of us today have: a quiet natural environment. What many of us never experience thanks to noise pollution, he experienced each and every night. He, together with the other sages of the Talmud lived in a world that had no noise other than the sound of human voices around a crackling fire and the background music of the natural world. It was an utterly different experience. Our modern world has given us many things to be grateful for, but noise is not one of them.

May you be blessed for a quiet and peaceful year ahead.

גמר טוב

{Want more Talmudology about Yom Kippur? Click here and here.]

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Bava Basra 97b ~ Wine and Snake Venom

In today’s page of Talmud there is brief reference to uncovered wine that is left overnight.  This wine should not be drunk because "סכנה היא" – it is dangerous to do so. Shmuel ben Meir, known as the Rashbam (d. ~1158) outlines the cause of this danger: ואיכא למיחש שמא שתה הימנו נחש - "we should be concerned that a snake may have drank from the wine."  The Rashbam, usually known for his lengthy commentaries, left out the most important part of the explanation. While drinking from the water, perhaps the snake expelled some of its venom into the wine, which would then become dangerous to drink.

Don't touch that wine

The rabbis of the Talmud were very worried indeed about the health effects of water - and wine - that had been left uncovered.  This concern was codified by Maimonides, and later by Ya'akov ben Asher (d. 1340) in his famous halakhic work called the Arba'ah Turim

טור יורה דעה הלכות מאכלי עובדי כוכבים סימן קטז 

דברים האסורים משום סכנה
  יש דברים שאסרום חכמים משום סכנה כגון משקין שנתגלו שיש לחוש שמא שתה מהן נחש והטיל בהן ארס אפי' אם שתו מהן אחרים ולא הוזקו אין לשתות מהן  שיש נחש שהארס צף למעלה ויש שארס שלו מפעפע עד אמצעית המשקה  ויש שהארס שלו שוקע לשולי הכלי לפיכך אפי' שתו ממנו אחרים ולא הוזקו אין לשתות מהן דשמא ארס של הנחש ששתה מהן שוקע ואלו המשקין שיש בהן משום גילוי מים יין חלב ודבש ושום כתוש 

Tur, Yoreh De'ah 116. Things that are Prohibited Because they are Dangerous

There are things that the rabbis of the Talmud prohibited because they are dangerous. For example, liquids that were left uncovered, because of the possibility that a snake drank from the water and expelled some of its poison into them. Even if others had drunk from the liquid, and not been injured, one should not drink from them.  For some snake venom floats on the surface, and some sinks to the middle and some moves to the edges of the vessel. Therefore, even if others had drunk and had suffered no harm, one should not drink from them, for perhaps the venom from the snake that had drunk the water had sunk to the bottom. The following liquids should not be drunk if they were left overnight in an uncovered vessel: water, wine, milk, honey, and crushed garlic...

The normative Code of Jewish Law, the שולחן ערוך agreed, but added an important caveat:

שולחן ערוך יורה דעה הלכות מאכלי עובדי כוכבים סימן קטז סעיף א 

משקים שנתגלו, אסרום חכמים דחיישינן שמא שתה נחש מהם והטיל בהם ארס. ועכשיו שאין נחשים מצויים בינינו, מותר

The rabbis forbade drinking from liquids that were left uncovered,. They were concerned that a snake may have drunk from them and expelled some of its poison into them. But now that snakes are not commonly encountered, this is permitted. (Shulchan Aruch Yoreh De'ah 116:1)

So today it is permitted for us to drink from an uncovered pot, but only in a place that does not have a problem with poisonous snakes.  Which is not helpful. There are poisonous snakes in nearly every state in the US, resulting in about 2,000 human envenomations each year, and we have noted before that Israel has its own problem with snakes, including the Palestinian Viper.  The World Health Organization estimates that snakes kill between 20,000 and 94,000 people per year. So exactly where this leniency of the Shulchan Aruch might apply is not clear.

But is drinking snake venom indeed dangerous? Maybe not. In 2012 India Today reported that police in New Delhi had seized about half a liter of snake venom to be used "in high-end raves planned for Valentine's Day in and around the national capital." Apparently the venom, when ingested, produces a euphoric state. Who knew?

VIDEO EVIDENCE - DRINKING COBRA VENOM

It is really hard to find any peer-reviewed scientific studies about people drinking snake venom, because, um, it's a silly thing to do.  But that doesn't mean it hasn't been done. So where could we turn to find people doing silly things? YouTube of course.(The real action begins at 10:13).

Want more? Ok then. Here's another one. This time it involves drinking the venom directly from spitting snake. Apparently, these kind of human interest stories are popular in India. 

WHY IT IS SAFE TO DRINK SNAKE VENOM

If you are a diabetic and take insulin, or know someone who does, you may have wondered why the drug has to be injected. It would, after all, be much less bothersome to swallow an insulin pill than to inject insulin several times a day.  The reason is that insulin is a protein, and like all proteins, it is easily broken down by heat and, more importantly, by the acid environment in the stomach.  Our gastrointestinal tracts evolved to break down proteins into their building blocks - and they perform a wonderful job doing precisely that.

Like insulin, snake venom is a complex protein. And so, like insulin, it too is easily broken down in the very acidic environment of your stomach.  Of course, if intact venom gets into your bloodstream, it could kill you. But if you drink venom, then the intact protein never does get into your bloodstream. You don't need to be an Indian snake charmer to safely drink snake venom. You just need a working digestive system.

How snakes drink

In case you were wondering how we know how snakes drink, here is a diagrammatic view of the apparatus used to record the kinematics and water transport during drinking. The video camera was placed to the left. LED, light-emitting diode. From Cu…

In case you were wondering how we know how snakes drink, here is a diagrammatic view of the apparatus used to record the kinematics and water transport during drinking. The video camera was placed to the left. LED, light-emitting diode. From Cundall, D. Drinking in snakes: kinematic cycling and water transport. The Journal of Experimental Biology. 2000; 203, 2171–2185.

The Talmud was concerned that snakes leave venom in the water from which they drank, and that a person drinking from that water would then suffer from envenomation. As we have seen, this concern has no biological basis, although theoretically, if there was an open cut or ulcer in the mouth, ingested venom could get into the bloodstream and then cause its havoc.  But there is another reason why the talmudic concern is overstated.  Snakes, you see, don't leave any venom when they drink water.  As you may have noted from watching the first video, it takes a lot to get a snake to expel its venom - like sticking a blue pen in its mouth.  Venom is a snake's most precious commodity, and it has evolved to protect that commodity. Snakes only release venom when they are in danger, or ready to strike their prey, and not otherwise. Want a great example? The venomous rattlesnake. That species has evolved a warning rattle to tell would-be predators that if they get any closer, they will be bitten. This only makes evolutionary sense if it was in the snake's best interest to do everything possible to conserve its venom.

In a fascinating article on how snakes drink published in The Journal of Experimental BiologyDavid Cundall notes that a snake's tongue does not carry or move water, and that "in many snakes, the tongue does not visibly move during drinking." That leads to the conclusion that snakes are suction drinkers. And that makes them even less likely to leave any venom behind in the water.

So let's put this all together:

  1. Snakes don't release their venom unless they are threatened or hunting. 

  2. Snakes use suction when they drink water. Their mouths are not open, which is needed when they are expelling venom.

  3. Snake venom is not dangerous when drunk.

  4. (If somehow venom did get into the water, it would be greatly diluted.)

So there is no danger if you were to drink from wine from which a venomous snake had drunk. None. But this was not known to the rabbis of the Talmud, for whom the advice to stay away from all things snake made for a very good public health message.

[Repost in part from Bava Kamma 115.]

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