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.
Leviticus 20:12
Surrounding context
20:11 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.
20:12 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.
20:13 If a man lies with a male as he lies with a woman, both of them have committed an abomination. They shall surely be put to death. Their blood shall be upon them.