Leviticus 20:12
And a man who lieth with his daughter-in-law -- both of them are certainly put to death; confusion they have made; their blood is on them.
Leviticus 18:15
The nakedness of thy daughter-in-law thou dost not uncover; she is thy son's wife; thou dost not uncover her nakedness.
Leviticus 18:23
And with any beast thou dost not give thy copulation, for uncleanness with it; and a woman doth not stand before a beast to lie down with it; confusion it is.
Genesis 38:16
and he turneth aside unto her by the way, and saith, 'Come, I pray thee, let me come in unto thee,' (for he hath not known that she is his daughter-in-law); and she saith, 'What dost thou give to me, that thou mayest come in unto me?'
Genesis 38:18
and he saith, 'What is the pledge that I give to thee?' and she saith, 'Thy seal, and thy ribbon, and thy staff which is in thy hand;' and he giveth to her, and goeth in unto her, and she conceiveth to him;
Deuteronomy 27:23
Cursed is he who is lying with his mother-in-law, -- and all the people have said, Amen.