Vows voluntary promises which, when once made, were to be kept if the thing vowed was right. They were made under a great variety of circumstances (Genesis 1:28; Leviticus 7:16; Numbers 30:2-13; Deuteronomy 23:18; Judges 11:30, Judges 1:11; 1 Samuel 1:11; Jonah 1:16; Acts 18:18; Acts 1:21).