Leviticus 20:10-12

20:10 If a man commits adultery with his neighbor’s wife, both the adulterer and the adulteress must be put to death. 20:11 If a man has sexual intercourse with his father’s wife, he has exposed his father’s nakedness. Both of them must be put to death; their blood guilt is on themselves. 20:12 If a man has sexual intercourse with his daughter-in-law, both of them must be put to death. They have committed perversion; their blood guilt is on themselves.