Leviticus 18:15
You must not have sexual relations with your daughter-in-law. She is your son’s wife; you are not to have sexual relations with her.
Berean Standard Bible
Thou shalt not uncover the nakedness of thy daughter in law: she is thy son’s wife; thou shalt not uncover her nakedness.
“‘You shall not uncover the nakedness of your daughter-in-law. She is your son’s wife. You shall not uncover her nakedness.