Numbers 30:2

30:2 If a man makes a vow to the Lord or takes an oath of binding obligation on himself, he must not break his word, but must do whatever he has promised.

Deuteronomy 23:21

23:21 When you make a vow to the Lord your God you must not delay in fulfilling it, for otherwise he will surely hold you accountable as a sinner.

Proverbs 20:25

20:25 It is a snare for a person to rashly cry, “Holy!”

and only afterward to consider what he has vowed.

Ecclesiastes 5:4

5:4 When you make a vow to God, do not delay in paying it.

For God takes no pleasure in fools:

Pay what you vow!

Romans 2:21-22

2:21 therefore you who teach someone else, do you not teach yourself? You who preach against stealing, do you steal? 2:22 You who tell others not to commit adultery, do you commit adultery? You who abhor idols, do you rob temples?