Deuteronomy 23:20-22

21st Century King James Version

²⁰ Unto a stranger thou mayest lend upon interest, but unto thy brother thou shalt not lend upon interest, 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.

²¹ “When 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.

²² But if thou shalt forbear to vow, it shall be no sin in thee.