daf bit: Nedarim 33

[cellio]

The mishnah teaches: if a man has vowed not to benefit from his neighbor, the neighbor may still pay his shekel (temple tax), settle his debts (if the debtor does not otherwise benefit), or return a lost item to him. The gemara compares these acts to driving away a lion -- a neighborly act. (33a)

(Today is really daf 34, but the discussion there is pretty complicated, with no good entry points.)

Comments

[magid.livejournal.com]

Of course, the mishnah leads me directly to the question of why someone is vowing not to benefit from his neighbor. Sounds like some feud or something, which shouldn't be dignified with the application of a vow anyway (imho).