Chapter Previewהַקְדָּמָה
In this chapter, we continue learning the halachos of serving hot food on Shabbos, moving from the laws of leaving food on a fire to the laws of hatmanah (insulating food to preserve its heat). Hashem's Torah allows us to keep our food warm for Shabbos, but the Chachamim established beautiful safeguards to prevent us from coming to do a melacha on Shabbos. We will learn to distinguish between two types of insulating materials: those that add heat (mosif hevel) and those that merely preserve the existing heat (ma'amid hevel).
We will also delve into the Rabbinic decrees surrounding when these materials may be used. The Sages forbade insulating food with heat-adding substances even before Shabbos begins, and they likewise restricted insulating with heat-preserving substances on Shabbos itself. Through these halachos, we see the incredible care the Chachamim took to ensure we do not accidentally stoke coals or cook on Shabbos, helping us guard the sanctity of the holy day.
All introductions, summaries, and contextual notes are the editor's commentary and are not part of the original text.אַלע הַקְדָּמוֹת, סִכּוּמִים, און הערות זענען דעם רעדאַקטאָר'ס באַמערקונגען און זענען נישט קיין טייל פונעם אָריגינעלן טעקסט.
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הַחִלּוּק בֵּין דָּבָר הַמּוֹסִיף הֶבֶל לְדָבָר שֶׁאֵינוֹ מוֹסִיף הֶבֶלHalacha 1 · The Distinction Between Substances That Increase Heat and Those That Only Preserve It
יֵשׁThere areדְּבָרִיםsubstancesשֶׁאִםthat ifטָמַןone insulatedבָּהֶןwith themהַתַּבְשִׁילthe cooked foodהוּאitמִתְחַמֵּםbecomes heatedוּמוֹסִיפִיןand they addבְּבִשּׁוּלוֹto its cookingכְּעֵיןlikeהָאֵשׁ.the fireכְּגוֹןsuch asהַגֶּפֶתolive peatוְזֶבֶלand manureוּמֶלַחand saltוְסִידand limeוְחוֹלand sandאוֹorזַגִּיןgrape skinsוּמוֹכִיןand unprocessed woolוַעֲשָׂבִיםand grassבִּזְמַןat a timeשֶׁשְּׁלָשְׁתָּןthat the three of themלַחִיםare dampוַאֲפִלּוּand evenמֵחֲמַתdue toעַצְמָן.themselvesוּדְבָרִיםand substancesאֵלּוּtheseנִקְרָאִיןare calledדָּבָרa substanceהַמּוֹסִיףthat increasesהֶבֶל.heatוְיֵשׁAnd there areדְּבָרִיםsubstancesשֶׁאִםthat ifטָמַןone insulatedבָּהֶןwith themהַתַּבְשִׁילthe cooked foodיִשָּׁאֵרit will remainבַּחֲמִימוּתוֹin its warmthבִּלְבַדaloneוְאֵינָןand they do notמוֹסִיפִיןaddלוֹto itבִּשּׁוּלcookingאֶלָּאbutמוֹנְעִיןthey preventאוֹתוֹitמִלְּהִצְטַנֵּן.from cooling downכְּגוֹןsuch asזַגִּיןgrape skinsוּמוֹכִיןand unprocessed woolוַעֲשָׂבִיםand grassיְבֵשִׁיןdryוּכְסוּתand clothingוּפֵרוֹתand produceוְכַנְפֵיand wings ofיוֹנָהa doveוּנְעֹרֶתand fine waste ofהַפִּשְׁתָּןthe flaxוּנְסֹרֶתand sawdust ofחָרָשִׁיםcarpentersוּשְׁלָחִיןand soft hidesוְגִזֵּיand shearings ofצֶמֶר.woolוּדְבָרִיםand substancesאֵלּוּtheseנִקְרָאִיןare calledדָּבָרa substanceשֶׁאֵינוֹthat does notמוֹסִיףincreaseהֶבֶל:heat
This halacha defines the two categories of insulating materials used for keeping food warm on Shabbos.
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אִסּוּר הַטְמָנָה בְּדָבָר הַמּוֹסִיף הֶבֶל וְדִינֵי בֵּין הַשְּׁמָשׁוֹתHalacha 2 · The Prohibition of Insulating Food with Heat-Increasing Substances and the Laws of Twilight
מִןFromהַדִּיןthe lawהָיָהit wasשֶׁטּוֹמְנִיןthat we may insulateבְּדָבָרwith a substanceהַמּוֹסִיףthat addsהֶבֶלheatמִבְּעוֹדwhile yetיוֹםdayוְיִשָּׁאֵרand it will remainהַתַּבְשִׁילthe foodטָמוּןinsulatedבְּשַׁבָּת.on Shabbosשֶׁהֲרֵיfor beholdמַשְׁהִיןwe may leaveעַלuponגַּבֵּיthe top ofהָאֵשׁthe fireבְּשַׁבָּת.on Shabbosאֲבָלbutאָסְרוּforbadeחֲכָמִיםthe Sagesלְהַטְמִיןto insulateבְּדָבָרwith a substanceהַמּוֹסִיףthat addsהֶבֶלheatמִבְּעוֹדwhile yetיוֹםdayגְּזֵרָהas a decreeשֶׁמָּאlestתַּרְתִּיחַit will boilהַקְּדֵרָהthe potבְּשַׁבָּתon Shabbosוְיִצְטָרֵךְand he will needלְגָלוֹתָןto uncover themעַדuntilשֶׁתָּנוּחַit subsidesהָרְתִיחָהthe boilingוְיַחֲזֹרand he will returnוִיכַסֶּהand coverבְּשַׁבָּתon Shabbosוְנִמְצָאand it turns outטוֹמֵןhe insulatesבְּדָבָרwith a substanceהַמּוֹסִיףthat addsהֶבֶלheatבְּשַׁבָּתon Shabbosשֶׁהוּאwhich isאָסוּר.forbiddenלְפִיכָךְThereforeמֻתָּרit is permittedלְהַטְמִיןto insulateבְּדָבָרwith a substanceהַמּוֹסִיףthat addsהֶבֶלheatבֵּיןbetweenהַשְּׁמָשׁוֹתthe sunsשֶׁסְּתָםsince ordinarilyקְדֵרוֹתpotsבֵּיןbetweenהַשְּׁמָשׁוֹתthe sunsכְּבָרalreadyרָתְחוּboiledוְנָחוּand subsidedמִבִּעֲבּוּעָןfrom their bubblingוְכֵיוָןand sinceשֶׁנָּחוּthey subsidedשׁוּבagainאֵינָןthey do notרוֹתְחִין:boil
The Rambam explains the Rabbinic decree against insulating food before Shabbos with materials that increase heat, and why this restriction is relaxed during twilight.
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אִסּוּר הַטְמָנָה בְּשַׁבָּת בְּדָבָר שֶׁאֵינוֹ מוֹסִיף הֶבֶלHalacha 3 · The Rabbinic Prohibition of Covering Hot Food on Shabbos Even with Substances that Do Not Add Heat
וְכֵןAnd soמִןfromהַדִּיןthe lawהָיָהit wasלִטְמֹןto coverהַתַּבְשִׁילthe cooked foodבְּדָבָרwith a substanceשֶׁאֵינוֹthat does notמוֹסִיףaddהֶבֶלheatבְּשַׁבָּתon Shabbosעַצְמָהּ.itselfאֲבָלbutאָסְרוּforbadeחֲכָמִיםthe Sagesדָּבָרmatterזֶהthisגְּזֵרָהas a decreeשֶׁמָּאlestיַטְמִיןhe will coverבְּרֶמֶץin hot ashesוְיִהְיֶהand there will beבּוֹin itנִיצוֹצוֹתsparksשֶׁלofאֵשׁfireוְנִמְצָאand he will find himselfחוֹתֶהrakingבַּגֶּחָלִים.in the coalsלְפִיכָךְthereforeאָסְרוּthey forbadeלְהַטְמִיןto coverדָּבָרa thingחַםhotבְּשַׁבָּתon Shabbosוַאֲפִלּוּand evenבְּדָבָרwith a substanceשֶׁאֵינוֹthat does notמוֹסִיףaddהֶבֶל:heat
The Sages decreed against covering hot food on Shabbos even with heat-retaining substances that do not increase temperature, as a safeguard against using hot ashes.
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דִּינֵי הַטְמָנָה בְּסָפֵק חֲשֵׁכָה וּבְשַׁבָּתHalacha 4 · Laws of Covering Hot and Cold Food on Shabbos and Twilight
סָפֵקDoubtחֲשֵׁכָהnightfallסָפֵקdoubtאֵינָהּit is notחֲשֵׁכָהnightfallמֻתָּרit is permittedלִטְמוֹןto coverאֶת—דָּבָרsomethingחַם.hotוּמֻתָּרand it is permittedלִטְמוֹןto coverאֶת—דָּבָרsomethingהַצּוֹנֵןcoldבְּשַׁבָּתon Shabbosבְּדָבָרwith somethingשֶׁאֵינוֹthat does notמוֹסִיףaddכְּדֵיin orderשֶׁלֹּאthat notיִצְטַנֵּןit will coolבְּיוֹתֵרmoreאוֹorכְּדֵיin orderשֶׁתָּפוּגthat will dissipateצִנָּתָן.their chillחַמִּיןHot foodשֶׁטְּמָנָןthat one coveredמֵעֶרֶבfrom the eve ofשַׁבָּתShabbosוְנִתְגַּלּוּand became uncoveredבְּשַׁבָּתon Shabbosמֻתָּרit is permittedלְכַסּוֹתָן.to cover themשֶׁהֲרֵיsinceאֵינוֹhe does notמוֹסִיף.addוּמֻתָּרand it is permittedלְהַחֲלִיףto changeהַכִּסּוּיthe coveringבְּשַׁבָּת.on Shabbosכֵּיצַד.how soנוֹטֵלhe removesכְּסוּתclothingוּמַנִּיחַand placesכַּנְפֵיwings ofיוֹנָהa doveאוֹorנוֹטֵלhe removesכַּנְפֵיwings ofיוֹנָהa doveוּמַנִּיחַand placesהַכְּסוּת:the clothing
This halacha discusses the permissibility of covering food during twilight, covering cold food to preserve its temperature, and recovering or changing the insulation of food on Shabbos.
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הַטְמָנַת כְּלִי שֵׁנִי בְּשַׁבָּתHalacha 5 · Insulating a Second Vessel on Shabbos
פִּנָּהOne emptiedהַתַּבְשִׁילthe cooked foodאוֹorהַמַּיִםthe waterהַחַמִּיןthe hotמִכְּלִיfrom a vesselלִכְלִיto a vesselאַחֵרanotherמֻתָּרit is permittedלְהַטְמִיןto insulateהַכְּלִיthe vesselהָאַחֵרthe otherבְּשַׁבָּתon Shabbosבְּדָבָרwith a substanceשֶׁאֵינוֹthat does notמוֹסִיף.addכְּמוֹjust likeהַדָּבָרthe thingהַצּוֹנֵן.the coldשֶׁלֹּאfor notאָסְרוּdid they forbidלְהַטְמִיןto insulateבְּשַׁבָּתon Shabbosאֶלָּאexceptדָּבָרa thingחַםhotשֶׁהוּאthat isבִּכְלִיin a vesselרִאשׁוֹןfirstשֶׁנִתְבַּשֵּׁלthat it was cookedבּוֹin itאֲבָלbutאִםifפִּנָּהוּhe emptied itמֻתָּר:it is permitted
This halacha teaches that the Rabbinic prohibition of insulating hot food on Shabbos applies only to a first vessel, but once transferred to a second vessel, it may be insulated with a non-heat-adding substance.
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הַנָּחַת כְּלִי חַם עַל גַּבֵּי כְּלִי חַם בְּשַׁבָּתHalacha 6 · Placing a Hot Vessel on Top of Another Hot Vessel on Shabbos
מַנִּיחִיןOne may placeמֵיחַםa hot-water urnעַלonגַּבֵּיtop ofמֵיחַםa hot-water urnבְּשַׁבָּתon Shabbosוּקְדֵרָהand a potעַלonגַּבֵּיtop ofקְדֵרָהa potוּקְדֵרָהand a potעַלonגַּבֵּיtop ofמֵיחַםa hot-water urnוּמֵיחַםand a hot-water urnעַלonגַּבֵּיtop ofקְדֵרָהa potוְטָחand sealפִּיהֶםtheir openingבְּבָצֵקwith doughלֹאnotבִּשְׁבִילfor the sakeשֶׁיּוּחַמּוּthat they should heat upאֶלָּאbutבִּשְׁבִילfor the sakeשֶׁיַּעַמְדוּthat they should standעַלonחֻמָּם.their warmthשֶׁלֹּאfor they did notאָסְרוּforbidאֶלָּאexceptלְהַטְמִיןto insulateבְּשַׁבָּתon Shabbosאֲבָלbutלְהַנִּיחַto placeכְּלִיa vesselחַםhotעַלonגַּבtop ofכְּלִיa vesselחַםhotכְּדֵיin orderשֶׁיִּהְיוּthat they shouldעוֹמְדִיןstandבַּחֲמִימוּתָןin their warmthמֻתָּר.is permittedאֲבָלbutאֵיןwe do notמַנִּיחִיןplaceכְּלִיa vesselשֶׁיֵּשׁthat hasבּוֹin itדָּבָרa thingצוֹנֵןcoldעַלonגַּבֵּיtop ofכְּלִיa vesselחַםhotבְּשַׁבָּתon Shabbosשֶׁהֲרֵיfor beholdמוֹלִידhe generatesבּוֹin itחֹםheatבְּשַׁבָּתon Shabbosוְאִםand ifהִנִּיחוֹhe placed itמִבָּעֶרֶבfrom the eveningמֻתָּרit is permittedוְאֵינוֹand it is notכְּטוֹמֵןlike one who insulatesבְּדָבָרin a substanceהַמּוֹסִיף:that adds heat
This halacha discusses the permissibility of stacking hot vessels on Shabbos to preserve their heat, while forbidding the placement of cold food on a hot vessel.
Chapter Summaryסִכּוּם
This chapter clarifies the practical guidelines of hatmanah by categorizing insulating substances into two groups: those that increase heat—such as manure, salt, lime, sand, and damp materials—and those that merely preserve heat, like dry garments, wool, and wood shavings. The Rambam explains that the Sages forbade insulating with heat-adding substances before nightfall as a safeguard, lest the pot boil over on Shabbos and one end up re-covering it with a heat-adding substance on Shabbos itself. However, this is permitted during beyn hash'mashot (twilight) when pots have typically finished boiling. Furthermore, the Sages forbade insulating even with heat-preserving substances on Shabbos itself to prevent a person from stirring hot coals or ashes while trying to keep their food warm.
לְמַעֲשֶׂהWhat To Take Home
The Torah's laws of hatmanah (insulating food) teach us a profound lesson about the nature of human desire and the wisdom of our Sages. The Torah itself would allow us to insulate food before Shabbos with materials that increase heat, or on Shabbos itself with materials that merely preserve heat. Yet, Chazal stepped in and drew a protective boundary. They knew that if a pot begins to boil over, a person's natural instinct is to rush in, uncover it, and then cover it back up—forgetting the sanctity of the day in the heat of the moment. They understood that when we are close to the 'sparks of fire,' we are only one quick, unthinking action away from stoking the coals.
This is the essence of making a 'seyag,' a fence around the Torah, in our own daily avodah. How often do we tell ourselves, 'I can handle being close to this temptation, I won't actually do anything wrong'? We rely on our intellect, believing we can stand right next to the heat without getting burned. But Chazal knew the human heart. When things get hot, when the pressure is on, our habits and impulses take over. True yiras Shamayim means recognizing our limitations and willingly keeping a safe distance from the things that trigger our yetzer hara.
Today, identify one area in your life where you are standing too close to the 'coals'—whether it is a challenging environment, a digital distraction, or a situation that tests your middos—and create a practical, personal boundary to keep yourself at a safe and holy distance.