Leviticus 18:11-13

New Revised Standard Version, Anglicised Catholic Edition

¹¹ You shall not uncover the nakedness of your father’s wife’s daughter, begotten by your father, since she is your sister. ¹² You shall not uncover the nakedness of your father’s sister; she is your father’s flesh. ¹³ You shall not uncover the nakedness of your mother’s sister, for she is your mother’s flesh.