'Vow' in the Bible
When a man offers a sacrifice of peace offerings to the Lord to fulfill a special vow or for a freewill offering, of the herd or of the flock, it must be perfect to be accepted; there shall be no defect in it.
In respect to an ox or a lamb which has an overgrown or stunted member, you may present it for a freewill offering, but for a vow it will not be accepted.
“Speak to the sons of Israel and say to them, ‘When a man makes a difficult vow, he shall be valued according to your valuation of persons belonging to the Lord.