Leviticus 20:9, 11-12

‘For everyone who curses his father or his mother shall surely be put to death. He has cursed his father or his mother. His blood shall be upon him.

The man who lies with his father’s wife has uncovered his father’s nakedness; both of them shall surely be put to death. Their blood shall be upon them. If a man lies with his daughter-in-law, both of them shall surely be put to death. They have committed perversion. Their blood shall be upon them.