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PESACHIM 20 (3 Av) - dedicated l'Iluy Nishmas Reb Aharon Dovid ben Elimelech Shmuel Kornfeld (Muncasz/Israel/New York), who passed away on 3 Av 5761, by his daughter Diane Koenigsberg and her husband Dr. Andy Koenigsberg. May his love for Torah and for Eretz Yisrael continue in all of his descendants.


1. A Tana explained how many items can transfer Tum'ah.
2. However, the Tana only stated that this (#1) shows three transfers of Tum'ah, seemingly making only a Shelishi k'Tum'ah.
3. If a dead Sheretz is inside an oven while bread is baking in it, the bread is considered a Sheni l'Tum'ah.
4. The Gemara discusses what one must do when Erev Pesach falls on Erev Shabbos.
5. There is a dispute about whether one may keep a barrel of wine of Terumah Teme'ah in order to treat his dirt floor.


1. If a dead Sheretz touches liquids, the liquids touch a vessel, the vessel touches food, and the food touches liquids, then the liquids are a Revi'i l'Tum'ah.
2. The Gemara therefore concludes that the case should be where a Sheretz touches a vessel, the vessel touches food, and the food touches liquids.
3. It is not considered a Rishon, since vessels do not become Tamei directly from the Tamei airspace of an earthenware vessel (i.e. the oven).
4. Rebbi Meir: One should burn all of his Chametz together before Shabbos, including Terumah Tehorah with Terumah Teme'ah, etc. Rebbi Yosi: Each category of Terumah (i.e. Tahor, Tamei, and Safek Tamei) should be burned separately.
5. Beis Hillel: He may do so. Beis Shamai: He must spill it all immediately, lest one mistakenly drink from it.

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