Audio by Ushy Fried

72:21 One who keeps coffee warm from Friday (afternoon) in a pit, for use on Shabbat, and covers it with pillows and the like 1 so that it (remains) hot; if one keeps it warm in sand, 2 It is forbidden for the whole pot to be kept warm in the sand, 3 even if one does not bury the whole pot but part of it and cover (the other) part with clothes or the like. so that all the pot is completely covered on all sides, this is also forbidden. Instead, the following procedure should be carried out: The pot containing the coffee should be only half covered or up to a third of it covered with the sand and the remainder left exposed. One (then) puts over the pit a board or a (larger) pot, so that there is an air space between this (cover) and the pot containing the coffee. Then, one can put over them clothes, pillows, or the like. (The rest of the laws of keeping food warm are in the Shulchan Aruch Chapters 257-259.)

1) In order to ensure that the acts of cooking or kindling a fire are not performed on Shabbat, the Sages prohibited ''keeping warm'' (insulating - Hatmonah) a pot of hot food on Shabbat by completely wrapping it in any material which retains heat (e.g. a towel). They even prohibited insulating a pot on Friday, if the insulating material not only retains the heat but actually intensifies it (Davar Hamosif Hevel). There are many criteria governing whether an act of insulating would be prohibited or permitted, and consequently, one would have to consult a detailed book about the Laws of Shabbat in order to determine the practical application of the law in each individual circumstance. 2) Sand is a substance which intensifies heat, and therefore, the prohibition applies to it even on Friday. 3) Any type of insulation may be used if a substantial section of the container is left uncovered. Furthermore, a loose wrapping, like draping a towel over a pot and allowing it to hang loosely, is not considered insulation and is therefore permitted, even though the entire container is covered.

המטמין קפה בערב שבת בתוך הגומא לצורך שבת ומכסהו בכרים וכדומה שיהא חם אם הוא מטמינו בתוך חול אסור להטמין כל הכלי בתוך החול ואפילו אינו מטמין כל הכלי אלא מקצתו ועל מקצתו מכסה בבגדים וכדומה באופן שכל הכלי מכוסה מכל הצדדים גם זה אסור אלא צריך לעשות באופן זה שהכלי אשר בתוכו הקפה יטמינו רק עד חציו או עד שלישיתו בתוך החול והמותר יהא באויר ויתן על הגומא דף או יכפה עליו כלי שיהא אויר בינו ובין הכלי שבתוכו הקפה ואז יכול ליתן עליהם בגדים וכרים וכדומה יתר דיני הטמנה בשלחן ערוך סימן רנ''ז רנ"ח רנ''ט
72:22 Near to the evening one should ask the members of one's household in a gentle tone: ''Have you separated the challah?'' 1 and tell them to light the candles.

1) See Chapter 35 - The laws of separating Challah.

סמוך לחשכה ישאל לאנשי ביתו בלשון רכה הפרשתם חלה ויאמר להם הדליקו את הנר

72:23 Everyone is obliged to check their clothes on Friday evening, before it becomes dark, to make sure there are no needles stuck in them or objects in one's pockets, even in a place where there is an Eruv, in case there is a forbidden object there.

1) ''Set apart'' (mukseh) - see Chapter 88.

חייב כל אדם למשמש בבגדיו בערב שבת קודם חשכה אם אין מחט תחוב בהם או אם אין איזה דבר בכיסים ואפילו במקום שיש עירוב שמא יש בהם איזה דבר מוקצה

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