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Prepared by P. Feldman
(a) (Gemara) Question #1: We understand, Shimon may not lend money to Reuven, for this benefits him; why can't Reuven lend Shimon?2) WAYS OF EVADING A VOW
(a) (Mishnah): Reuven asked to borrow Shimon's cow; Shimon said, it is not free. Reuven vowed 'I will never plow my field with it' - if Reuven normally plows, he may not plow his own field with it, but other people may plow Reuven's field with it;1. If Reuven does not normally plow, no one may plow Reuven's field with it.(b) Reuven vowed not to get benefit from Shimon, and Reuven has nothing to eat. Shimon may go to a grocer and say, Reuven vowed not to benefit from me - what will I do?1. The grocer supplies Reuven, and Shimon pays for it.(c) If Reuven had to build a house or a fence or harvest his field, Shimon may go to workers and say, Reuven vowed not to benefit from me - what will I do?1. They do the work Reuven needs, and Shimon pays for it.(d) If Reuven and Shimon were walking on the road, and Reuven has nothing to eat - Shimon may give a gift of food to a 3rd party, who then gives it to Reuven;1. If no one else is around, Shimon leaves the food on a rock or on the fence and declares it Hefker (ownerless). Reuven may take it; R. Yosi does not allow this.(e) (Gemara - R. Yochanan) Question: Why does R. Yosi forbid this?
Next daf(g) Answer #2 (Rava): R. Yosi forbids as a decree on account of an (insincere) gift as the case in Beis Choron.ii. If Hefker does not take effect until someone takes it - in either case, it should be forbidden!3. Answer (R. Aba): Anyone who vows does not intend to forbid what was declared Hefker.