Leviticus 20:12
And if a man shall 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.
Leviticus 18:15
Thou shalt not uncover the nakedness of thy daughter-in-law: she is thy son's wife, thou shalt not uncover her nakedness.
Leviticus 18:23
Neither shalt thou lie with any beast to defile thyself therewith: neither shall any woman stand before a beast to lie down thereto: it is confusion.
Genesis 38:16
And he turned to her by the way, and said, Come, I pray thee, let me have access to thee; (for he knew not that she was his daughter-in-law:) and she said, What wilt thou give me, that thou mayst have access to me?
Genesis 38:18
And he said, What pledge shall I give thee? and she said, Thy signet, and thy bracelets, and thy staff that is in thy hand: and he gave them to her, and came 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.