Deuteronomy 23:22

23:22 If you refrain from making a vow, it will not be sinful.

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.

Acts 5:4

5:4 Before it was sold, did it not belong to you? And when it was sold, was the money not at your disposal? How have you thought up this deed in your heart? You have not lied to people but to God!”