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Torah · 1:31:26

Rabbi Yaakov Cohen • The Labor of Cooking: When is it permitted to turn on hot water on Shabbat?

179 views · Oct 11, 2026

Musayof Synagogue

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Wishing you a good month. Hello and blessings to everyone. We will continue with the work of cooking that we started. Last week I touched a little bit on the laws of lighting candles. Because we talked about the laws of " Te'alum Atar"(Hidden Place). Today we will return to the laws of cooking. We have four rules in the laws of cooking. There is cooking by the sun, by a derivative of the sun, by fire, and by a derivative of fire. Cooking by the sun means literally in the sunlight, and it is not forbidden by Rabbinic decree. It is entirely exempt. A person who cooks with a derivative of the sun is exempt from Torah law because the Torah only forbade fire or a derivative of fire, but it is forbidden by Rabbinic decree; the Sages decreed that if a person cooks with a derivative of the sun, they might come to cook with a derivative of fire. I will give an example so we can understand: A person took a frying pan and put it in the sun , and this pan became boiling hot. A black pan is prone to absorbing great heat. I take an egg and pour it onto it . This was not on fire. It was not on fire at all. Nevertheless, it is forbidden by Rabbinic decree to cook with such a thing. This is called a derivative of the sun. It is not "by

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  1. 0:05Wishing you a good month. Hello and blessings to everyone. We will continue with the work…
  2. 6:38the case of a Rabbinic prohibition. Therefore, water that sat in a solar boiler and I…
  3. 12:53That is a permitted action. The same applies if I forgot snacks, nuts, or watermelons in…
  4. 19:17is: anything that is subject to a dispute is permitted to be done by a non-Jew.…
  5. 25:42>> Yes, because in a third vessel, even tea bags that are not cooked are permitted.…
  6. 32:02not crumbling bread or matzot, and not putting them into a hot vessel that is boiling.…
  7. 38:16prohibition of baking. But for our purposes, bread that is baked is permitted to be placed…
  8. 44:40permitted to take the pot before pouring it into the main dish or bowl, add salt,…
  9. 50:56is forbidden to put a tea bag in a " second vessel," because a "second vessel"…
  10. 57:16said: "Only the gold, the silver, the copper, the iron, the tin, and the lead ,"…

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