שבת ג׳Shabbat 3

Mishnah 1א׳

כִּירָה שֶׁהִסִּיקוּהָ בְקַשׁ וּבִגְבָבָא, נוֹתְנִים עָלֶיהָ תַּבְשִׁיל. בְּגֶפֶת וּבְעֵצִים, לֹא יִתֵּן עַד שֶׁיִּגְרֹף, אוֹ עַד שֶׁיִּתֵּן אֶת הָאֵפֶר. בֵּית שַׁמַּאי אוֹמְרִים, חַמִּין אֲבָל לֹא תַבְשִׁיל. וּבֵית הִלֵּל אוֹמְרִים, חַמִּין וְתַבְשִׁיל. בֵּית שַׁמַּאי אוֹמְרִים, נוֹטְלִין אֲבָל לֹא מַחֲזִירִין. וּבֵית הִלֵּל אוֹמְרִים, אַף מַחֲזִירִין:

A kirah [a place made in the ground to accommodate two pots, the fire passing beneath them], which was heated with straw and gevava [wood chips as thin as straw which are raked (govevin) from the field] — a dish may be placed upon it [from Sabbath eve, to leave it there on the Sabbath]. (If it were heated) with gefeth [what is left of olives or sesame after their oil is extracted] or with wood, he may not place it there until [the coals] are scraped out [of the kirah] or until he places ashes [on the coals to cover and cool them — a decree lest he stir the coals on the Sabbath to hasten the cooking. This decree obtains specifically with a dish which has not been entirely cooked, or even with one which has been entirely cooked, but which improves by boiling down. But if the dish has not been cooked at all or it deteriorates by boiling down, it is permitted to leave it on the kirah even if it has not been scraped or covered with ashes, and we do not fear that he might stir the coals, since he removed his mind from it. The same applies to a dish which was entirely cooked but into which he threw a raw limb close to ben hashmashoth. It all becomes like a dish that he had not cooked at all, because he removed his mind from it.] Beth Shammai say: Hot [water may be put on a kirah after it is scraped, for it need not be cooked and there is no need to decree lest he stir the coals], but not a dish, [even if the kirah had been scraped. For it is impossible to scrape all the coals until not a spark is left, and he might come to stir it since he wants the dish to cook.]; and Beth Hillel say: It may be taken, but not returned. [Even hot water, which it is permitted to leave on a kirah which has been scraped and covered with ashes — after he takes it off, it is not to be returned, for it gives the impression that he is cooking on the Sabbath.] And Beth Hillel say: He may also return it, [both hot water or a dish, after he has taken it off. Beth Hillel permitted its being returned only if it were still in his hand, if he did not place it on something else. But if he placed it on the ground or on something else, even Beth Hillel hold that he may not return it, for it is like "storing" ab initio on the Sabbath.]

Mishnah 2ב׳

תַּנּוּר שֶׁהִסִּיקוּהוּ בְקַשׁ וּבַגְּבָבָא, לֹא יִתֵּן בֵּין מִתּוֹכוֹ בֵּין מֵעַל גַּבָּיו. כֻּפָּח שֶׁהִסִּיקוּהוּ בְקַשׁ וּבִגְבָבָא, הֲרֵי זֶה כְכִירַיִם, בְּגֶפֶת וּבְעֵצִים, הֲרֵי הוּא כְתַנּוּר:

A tanur (an oven) which was heated with straw or with gevava [Because a tanur is narrow above and broad below, its heat is more concentrated than that of a kirah, so that even if it were heated with straw or with gevava, we fear that he might stir the coals, for he never removes his mind from it] — a dish may not be placed in it, both within or on the side. A kupach which was heated with straw or gevavah is like a kirayim; with gefeth or wood, like a tanur. [A kupach is made like a kirah, but it is as long as it is broad, so that there is room for only one dish. The fire passes beneath it and its heat is greater than that of a kirah (because a kirah is open above the space of two pots, whereas the kupach is open only the space of one pot), and less than that of a tanur.]