REVACH L'DAF
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SUMMARY
1. There is a dispute about the law of an egg that was partially laid before Yom Tov.
2. There is a dispute about the status of an egg found inside a slaughtered chicken.
3. The Gemara says that offspring are born according to the time of day at which the parents cohabit.
4. The Gemara presents a law based on this fact (#3).
5. In performing the Mitzvah of Kisuy ha'Dam, earth must be both under and over the blood.
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A BIT MORE
1. If most of an egg emerged before Yom Tov, went back inside the chicken, and then was laid on Yom Tov, Rebbi Yochanan permits it since it was already considered laid before Yom Tov. Others say that it must exit entirely out of the chicken to be considered ready for Yom Tov use.
2. Tana Kama: Such an egg may be eaten with milk. Rebbi Yakov: If sinews were mixed in with the egg (as the egg was already starting to develop), it may not be eaten at all.
3. A species that cohabits only at night gives birth only at night. A species that cohabits only during the day gives birth only during the day. If it cohabits during either the day or the night, it gives birth at any time.
4. If a person examined a chicken before Yom Tov and saw no egg, and then he woke up before daybreak on Yom Tov and saw that the chicken had laid an egg, he may assume that the egg is from before Yom Tov. Since chickens cohabit only during the daytime, the egg must have been laid before Yom Tov.
5. The Torah states that it is a Mitzvah to cover the blood of any bird or undomesticated animal after it is slaughtered. One must slaughter it over earth so that the blood falls on the earth, and it must then be covered with earth.
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