23 Cursed is he that lies with his daughter-in-law: and all the people shall say, So be it. Cursed is he that lies with his wife's sister: and all the people shall say, So be it.
Deuteronomy 27:23 Cross References - Brenton
Leviticus 18:17
17 The nakedness of a woman and her daughter shalt thou not uncover; her son's daughter, and her daughter's daughter, shalt thou not take, to uncover their nakedness, for they are thy kinswomen: it is impiety.
Leviticus 20:14
14 Whosoever shall take a woman and her mother, it is iniquity: they shall burn him and them with fire; so there shall not be iniquity among you.