Deuteronomy 23:19-21

World English Bible

¹⁹ You shall not lend on interest to your brother: interest of money, interest of food, interest of anything that is lent on interest. ²⁰ You may charge a foreigner interest; but you shall not charge your brother interest, that Yahweh your God may bless you in all that you put your hand to, in the land where you go in to possess it.

²¹ When you vow a vow to Yahweh your God, you shall not be slack to pay it, for Yahweh your God will surely require it of you; and it would be sin in you.