Leviticus 18:8-10

New Revised Standard Version Catholic Edition

⁸ You shall not uncover the nakedness of your father’s wife; it is the nakedness of your father. ⁹ You shall not uncover the nakedness of your sister, your father’s daughter or your mother’s daughter, whether born at home or born abroad. ¹⁰ You shall not uncover the nakedness of your son’s daughter or of your daughter’s daughter, for their nakedness is your own nakedness.