Deuteronomy 23:21 When you shall vow a vow to the LORD your God, you shall not slack to pay it: for the LORD your God will surely require it of you; and it would be sin in you. Torrey's Topical Textbook
Ecclesiastes 5:4 When you vow a vow to God, defer not to pay it; for he has no pleasure in fools: pay that which you have vowed. Torrey's Topical Textbook
