And it is liable to leket, shich'chah, and peah; and the poor Yisraelim and the poor Kohanim collect [these gifts], and the poor Yisraelim sell theirs to the Kohanim for the price of terumah, and the money is theirs. R' Tarfon says: None should collect ex-cept for the poor Kohanim, lest they forget and put into their mouths. R' Akiva said to him: If so, no one should collect other than [a person who is] tahor.