with a rim [gedanfa] of dough around its rim, and filled it with water and boiled it, so that the water boiled along its rim. Rava said: Who would be clever enough to perform such an action if not Rav Akavya, as he is a great man. He maintains that as it absorbs it so it expels it; just as the rim absorbs the forbidden substance by small drops of it that reach the rim, so too it expels the forbidden substance by small drops of boiling water that reach the rim.

§ The mishna teaches: With regard to the knife, one must polish it and it is rendered pure. Rav Ukva bar Ḥama says: And one must thrust it ten times into the ground. Rav Huna, son of Rav Yehoshua, says: And this must be done in untilled earth, i.e., hard earth. Rav Kahana says: And this applies to a good knife that does not have notches, so that the entire surface of the knife is scraped against the ground. This is also taught in a baraita: With regard to a good knife that does not have notches, one can thrust it ten times into the ground. Rav Huna, son of Rav Yehoshua, says: This is sufficient for the purpose of eating cold food with it.

This is like that incident involving Mar Yehuda, an important personage of the house of the Exilarch, and Bati bar Tuvi, a wealthy man, who were sitting before King Shapur, the king of Persia. The king’s servants brought an etrog before them. The king cut a slice and ate it, and then he cut a slice and gave it to Bati bar Tuvi. He then stuck the knife ten times in the ground, cut a slice, and gave it to Mar Yehuda. Bati bar Tuvi said to him: And is that man, referring to himself, not Jewish? King Shapur said to him: I am certain of that master, Mar Yehuda, that he is meticulous about halakha; but I am not certain of that master, referring to Bati bar Tuvi, that he is meticulous in this regard.

There are those who say that King Shapur said to him: Remember what you did last night. The Persian practice was to present a woman to each guest, with whom he would engage in intercourse. Mar Yehuda did not accept the woman who was sent to him, but Bati bar Tuvi did, and therefore he was not assumed to be meticulous with regard to eating kosher food.

May we return to you chapter “One who rents a worker” and this is the end of Tractate Avodah Zarah