Leviticus 20:9, 11-12

‘If anyone curses his father or mother, he shall most certainly be put to death; he has cursed his father or mother; his blood is on him [that is, he bears full responsibility for the consequences].

The man who lies [intimately] with his father’s wife has uncovered his father’s nakedness; both of them shall most certainly be put to death; their blood is on them. If a man lies [intimately] with his daughter-in-law, both of them shall most certainly be put to death; they have committed incest; their blood is on them.