Leviticus 20:12
If a man lie with his daughter-in-law they shall die both of them: they have wrought abomination, their blood upon their heads.
Leviticus 18:15
Thou shalt not uncover the privities of thy daughter-in-law, she is thy son's wife; therefore uncover not her privities.
Leviticus 18:23
Thou shalt lie with no manner of beast to defile thyself therewith, neither shall any woman stand before a beast to lie down thereto, for that is abomination.
Genesis 38:16
And turned to her unto the way and said, "Come, I pray thee, let me lie with thee." For he knew not that it was his daughter-in-law. And she said, "What wilt thou give me, for to lie with me?"
Genesis 38:18
Then said he, "What pledge shall I give thee?" And she said, "Thy signet, thy necklace, and thy staff that is in thy hand." And he gave it her and lay by her, and she was with child by him.
Deuteronomy 27:23
"'Cursed be he that lieth with his mother-in-law.' And all the people shall say, 'Amen.'