Reference for Bava Metzia 163:2

והא מדקתני סיפא ר' יהודה אומר הלוהו מעות שומר חנם הלוהו פירות שומר שכר מכלל דלתנא קמא לא שני ליה

— But [say thus:] There is no difficulty: in the latter case, he lent him money; in the former [sc. our Mishnah], provisions.<span class="x" onmousemove="('comment',' Since provisions deteriorate, the creditor derives a benefit from lending them, as he will have fresh provisions returned, and consequently he ranks as a paid bailee. ');">²</span>

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