Deuteronomy 23:20

Unto a stranger thou mayest lend upon usury, perhaps one passing through Israel for purposes of trade; but unto thy brother, a member of the children of Israel, thou shalt not lend upon usury, the peculiar circumstances of the chosen people of God demanding the strictest insistence upon the law of love; that the Lord, thy God, may bless thee in all that thou settest thine hand to in the land whither thou goest to possess it.