Leviticus 18:17 Thou shalt not uncover the nakedness of a woman and her daughter, neither shalt thou take her son's daughter, or her daughter's daughter, to uncover her nakedness; for they are her near kinswomen: it is wickedness.

Deuteronomy 27:23 Cursed be he that lieth with his mother in law. And all the people shall say, Amen.

Ezekiel 22:11 And one hath committed abomination with his neighbour's wife; and another hath lewdly defiled his daughter in law; and another in thee hath humbled his sister, his father's daughter.