Deuteronomy 23:20-22

New Century Version

²⁰ You may charge foreigners, but not fellow Israelites. Then the Lord your God will bless everything you do in the land you are entering to take as your own.

²¹ If you make a promise to give something to the Lord your God, do not be slow to pay it, because the Lord your God demands it from you. Do not be guilty of sin. ²² But if you do not make the promise, you will not be guilty.