Leviticus 20:9, 11-12

‘If there is anyone who curses his father or his mother, he shall surely be put to death; he has cursed his father or his mother, his bloodguiltiness is upon him.

If there is a man who lies with his father’s wife, he has uncovered his father’s nakedness; both of them shall surely be put to death, their bloodguiltiness is upon them. If there is a man who lies with his daughter-in-law, both of them shall surely be put to death; they have committed incest, their bloodguiltiness is upon them.