if a soul: This relates to rash oaths or vows, which a man was afterwards unable, or which it would have been sinful, to perform.
to do evil: Leviticus 27:2-34; Joshua 2:14, Joshua 9:15; Judges 9:19, Judges 11:31, Judges 21:7, Judges 21:18; 1 Samuel 1:11; 1 Samuel 14:24-28, 1 Samuel 24:21-22, 1 Samuel 25:22; 2 Samuel 21:7; 2 Kings 6:31; Psalms 132:2-5; Ecclesiastes 5:2-6; Ezekiel 17:18-19; Matthew 14:7, Matthew 14:9; Mark 6:23; Acts 23:12