[If one's wife said:] “Konam, what I benefit from people,” he cannot revoke it, and she can benefit from the gleanings, the forgotten sheaf, and the corner of the field.  [If one said:] “Konam, Kohanim or Leviim benefiting from me” —- they may take [it] against his will. “[Konam], these Kohanim or these Leviim benefiting from me” —- others may take [it].