Deuteronomy 27:23
Cursed is the one who has sexual relations with his mother-in-law.' Then all the people will say, 'Amen!'
Leviticus 20:14
If a man has sexual intercourse with both a woman and her mother, it is lewdness. Both he and they must be burned to death, so there is no lewdness in your midst.
Leviticus 18:17
You must not have sexual intercourse with both a woman and her daughter; you must not take as wife either her son's daughter or her daughter's daughter to have intercourse with them. They are closely related to her -- it is lewdness.
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