Deuteronomy 15:3

of a foreigner, a non-Israelite, thou mayest exact it again, in his case payment could be demanded, because he was not bound by the law which forbade the cultivation of the soil in the seventh year, and was therefore supposed to be in a position to pay, since he had had his usual income; but that which is thine with thy brother thine hand shall release, of him the return of the loan should not be exacted,