Deuteronomy 23:19-25

19Thou shalt not lend upon usury to thy brother; usury of money, usury of victuals, usury of any thing that is lent upon usury: 20unto a foreigner thou mayest lend upon usury; but unto thy brother thou shalt not lend upon usury: that the LORD thy God may bless thee in all that thou puttest thine hand unto, in the land whither thou goest in to possess it. 21When thou shalt vow a vow unto the LORD thy God, thou shalt not be slack to pay it: for the LORD thy God will surely require it of thee; and it would be sin in thee. 22But if thou shalt forbear to vow, it shall be no sin in thee. 23That which is gone out of thy lips thou shalt observe and do; according as thou hast vowed unto the LORD thy God, a freewill offering, which thou hast promised with thy mouth. 24When thou comest into thy neighbour’s vineyard, then thou mayest eat grapes thy fill at thine own pleasure; but thou shalt not put any in thy vessel. 25When thou comest into thy neighbour’s standing corn, then thou mayest pluck the ears with thine hand; but thou shalt not move a sickle unto thy neighbour’s standing corn.