Sage Advice for Avoiding Plagues

§ The Sages taught: If there is plague in the city, gather your feet, i.e., limit the time you spend out of the house, as it is stated in the verse: “And none of you shall go out of the opening of his house until the morning.” And it says in another verse: “Come, my people, enter into your chambers, and shut your doors behind you; hide yourself for a little moment, until the anger has passed by” (Isaiah 26:20). And it says: “Outside the sword will bereave, and in the chambers terror” (Deuteronomy 32:25).

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One must refrain from putting coins in one's mouth, lest it's covered with dried saliva of those afflicted with boils. He should not put the palm of his hand in his arm pit, lest his hand touched a metzorah or a harmful poison. He should not put a loaf of bread under his armpit, because of the sweat. He should not put a cooked item or drinks under the bed, since an evil spirit rests on them. He should not stick a knife in an esrog or a radish, lest one fall on its edge and die. Hagah: Similarly, he should be careful of all things that cause danger, because danger is stricter than transgressions, and one should be more careful with an uncertain danger than with an uncertain issur. They also prohibited to go in a dangerous place, such as under a leaning wall, or alone at night. They also prohibited to drink water from rivers at night or to put one's mouth on a stream of water and drink, because these matters have a concern of danger. It is the widespread custom not to drink water during the equinox, and the early ones wrote this and it is not to be changed. They also wrote to flee from the city when a plague is in the city, and one should leave at the beginning of the plague and not at the end. And all of these things are because of the danger, and a person who guards his soul will distance himself from them and it is prohibited to rely on a miracle in all of these matters.

In a similar vein, Rav Yitzḥak, son of Rav Yehuda, said: A person should always pray that he will not become ill, as if he becomes ill they say to him: Bring proof of your virtue and exempt yourself. It is preferable for a person not to be forced to prove that he merits staying alive, as he might not be able to prove it. Mar Ukva said: What is the verse that alludes to this? As it says: “When you build a new house, then you shall make a parapet for your roof, that you bring not blood upon your house, if the fallen falls mimenu” (Deuteronomy 22:8). He explains: Mimenu, from him proof must be brought. When one falls from his previous situation, it is his own responsibility to prove his innocence and emerge unharmed.

לא אשים עליך I WILL NOT PLACE ON THEE — and if I do place them on thee, it will be as though they had not been placed on thee. כי אני ה׳ רפאך BECAUSE I AM THE LORD THAT HEALETH THEE. This is its Midrashic explanation (Mekhilta d'Rabbi Yishmael 15:15). But according to its literal sense the meaning is: For I am the Lord who healeth thee and teacheth thee the Law and Commandments in order that thou mayst be saved from them (these diseases) — like a physician who says to a man: Do not eat this thing lest it will bring you into danger from this disease. So, too, it states, (Proverbs 3:8) “It (obedience to God) will be wholesome to thy body” (implying that disease will not fall upon thee) (Mekhilta d'Rabbi Yishmael 15:15).

the little owl, the great owl, and the white owl;