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ERUVIN 101 – The Zechus of today's learning has been dedicated by Dr. Louis and Rita Katz of Modi'in, Israel, for the Refuah Sheleimah of their granddaughter, Dafna Chaya bat Chasya Rivka.


1. The Mishnah discusses which sealants one may not use to seal a doorway.
2. There is a dispute about when it is permitted to use such an item to seal a doorway when the item drags on the ground.
3. One may not use a board that is not on a hinge to seal a breach in a wall.
4. Rebbi Yehoshua ben Chananyah explained to a Tzeduki the meaning of the verse, "Their good ones are like thorns."
5. The Mishnah discusses the law of an item used to lock a door that could also be used for crushing peppers.


1. A board (or other item, such as a large mat) that serves as a door to an entranceway but does not fit exactly, may not be used if it drags on the ground, because it appears like the Melachah of building.
2. Abaye: It is permitted when it is attached to a hinge. Rava: It is permitted even if it had once been attached to a hinge in this place.
3. This also gives the appearance of building.
4. This means that just as thorns protect open areas, righteous Jews protect Bnei Yisrael.
5. Rebbi Eliezer: It is forbidden to use it to lock the door unless it is tied to the door. Rebbi Yosi: It is permitted to use it to lock the door because it is a vessel.

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