Leviticus 18:9-11

New Catholic Bible

⁹ You shall not uncover the nakedness of your sister, whether she be the daughter of your father or the daughter of your mother, whether she be born in your household or elsewhere. ¹⁰ You shall not uncover the nakedness of your son’s daughter nor shall you uncover the nakedness of your daughter’s daughter, for their nakedness is like your own nakedness. ¹¹ You shall not uncover the nakedness of the daughter of your father’s wife, the daughter born of your father. She is your sister, you shall not uncover her nakedness.