Leviticus 18:17
17 You shall not uncover the nakedness of a woman and of her daughter, and you shall not take her son’s daughter or her daughter’s daughter to uncover her nakedness; they are relatives; it is depravity.
Deuteronomy 27:23
23 m“‘Cursed be anyone who lies with his mother-in-law.’ And all the people shall say, ‘Amen.’