Deuteronomy 23:19-20 - Interest On Loans
19 Thou shalt not lend upon interest to thy brother; interest of silver, interest of food, interest of any word which shall be lent on interest 20 To a foreigner thou shalt lend on interest; and to thy brother thou shalt not lend on interest: so that Jehovah thy God shall bless thee in all the stretching forth of thy hand upon the land which thou goest there to possess it