And if a man lie with his daughter in law, both of them shall surely be put to death: they have wrought confusion; their blood shall be upon them. They have wrought confusion - See Leviticus 18, and especially the note on Leviticus 18:6 (note).
Related Commentaries of Leviticus 20:12
Leviticus 20:12
12 And if a man lie with his daughter in law, both of them shall surely be put to death: they have wrought confusion; their blood shall be upon them.