(Mishnah): If a Kirah (rectangular oven with room to put two pots on it) was heated with straw or stubble, one may put a Tavshil (cooked food) on it.

If it was heated with Gefes (the waste of olives or sesame after the oil was extracted) or wood, one may not put in it unless it was Garuf v'Katum (the coals were swept out [or to the side - Ba'al ha'Ma'or] or ashes were put on the coals.)

Beis Shamai permit hot water [for it does not require further cooking], but not a Tavshil (this will be explained);

Beis Hillel permit hot water and a Tavshil.

Beis Shamai permit removing from the Kirah, but not returning to it;

Beis Hillel permit removing and even returning.

(Gemara): Our Mishnah discusses Shehiyah of (leaving) a Tavshil on [the oven. Even this requires Garuf v'Katum]. Our Mishnah is like R. Yehudah;

(Beraisa): If there were two identical Kirah ovens [attached with a wall in between], and one of them was Garuf v'Katum and the other was not Garuf v'Katum, one may do Shehiyah on the one that is Garuf v'Katum;

What may one be Meshaheh on it? Beis Shamai say, one may not be Meshaheh anything on it. Beis Hillel permit hot water, but not a Tavshil.

If one removed the kettle, all agree that one may not return it. R. Meir says so;

R. Yehudah says, Beis Shamai permit hot water, but not a Tavshil. Beis Hillel permit hot water and a Tavshil.

If one removed the kettle, Beis Shamai say that one may not return it. Beis Hillel say, he may return it.

(R. Chelbo citing Rav Anan citing Rav): We discuss Shehiyah on it, but not inside it.

Question: Until where [is considered on it? There are holes on top to put pots. If the bottom of the pot fits in the hole, it descends inside.]

Answer #1 (Ula): Up to three [Tefachim into the oven is considered on it - RAMBAN].

Answer #2 (R. Mana): It is until the place of a crevice [that potters make around the oven towards the top].

(R. Yosi bei R. Bun): It is because ha'Yad Sholetes Bo (his hand can go there without getting scalded, i.e. it is not hot enough to cook).

This is like R. Ze'ira said in the name of R. Yehudah - one may put [food] to get warm in a place that ha'Yad Sholetes, but one may not put to get warm in a place that Ein ha'Yad Sholetes.

R. Yoshi'a bar Gizura used to serve R. Ze'ira, and he would bring in front of him boiling hot food. [R. Ze'ira] asked how he did so.

R. Yoshi'a: I sweep the oven [before Shabbos], and I put [the food] inside.

R. Ze'ira: Do not do so. Rather, sweep the oven and put three rocks [on the floor] and put [the food] on them.

R. Avahu ruled in Botzrah to put a handful of mud [on the floor] and put three rocks on it, and put [the food] on them. (He was stringent, for they were unlearned. We explained this like PNEI MOSHE.)