'Vow' in the Bible

When the Lord heard you, he became angry and made this vow:

You must never bring the pay of a female prostitute or the wage of a male prostitute into the temple of the Lord your God in fulfillment of any vow, for both of these are abhorrent to the Lord your God.

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.

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

Whatever you vow, you must be careful to do what you have promised, such as what you have vowed to the Lord your God as a freewill offering.