Leviticus 20:12
And if a man lie with his daughter-in-law, both of them shall certainly be put to death: they have wrought confusion; their blood is upon them.
Leviticus 18:15
The nakedness of thy daughter-in-law shalt thou not uncover: she is thy son's wife; thou shalt not uncover her nakedness.
Leviticus 18:23
And thou shalt lie with no beast to become unclean therewith; and a woman shall not stand before a beast to lie down with it: it is confusion.
Genesis 38:16
And he turned aside to her by the way, and said, Come, I pray thee, let me go in to thee; for he did not know that she was his daughter-in-law. And she said, What wilt thou give me, that thou mayest come in to me?
Genesis 38:18
And he said, What pledge shall I give thee? And she said, Thy signet, and thy lace, and thy staff which is in thy hand. And he gave it her, and went in to her; and she conceived by him.
Deuteronomy 27:23
Cursed be he that lieth with his mother-in-law! And all the people shall say, Amen.