23 “‘Cursed is the one who has sexual relations with his mother-in-law.“Then all the people are to respond by saying, ‘Amen!’
Deuteronomy 27:23 Cross References - ISV
Leviticus 18:17
17 “You are not to have sexual relations with a woman and her daughter.
“You are not to have sexual relations with her son’s daughter or her daughter’s daughter. They’re near blood relatives. It’s wickedness.
“You are not to have sexual relations with her son’s daughter or her daughter’s daughter. They’re near blood relatives. It’s wickedness.
Leviticus 20:14
14 “If a man takes a wife along with her mother, that’s wickedness. They are to be burned with fire—that is, both him and them, so that there will be no wickedness in your midst.