Deuteronomy 23:19-20 - Interest On Loans
19 Thou shalt take no interest of thy brother, interest of money, interest of victuals, interest of anything that can be lent upon interest: 20 of a foreigner thou mayest take interest, but of thy brother thou shalt not take interest; that Jehovah thy God may bless thee in all the business of thy hand in the land whither thou goest to possess it.