Leviticus 18:5-7

Revised Standard Version Catholic Edition

⁵ You shall therefore keep my statutes and my ordinances, by doing which a man shall live: I am the Lord.

⁶ “None of you shall approach any one near of kin to him to uncover nakedness. I am the Lord. ⁷ You shall not uncover the nakedness of your father, which is the nakedness of your mother; she is your mother, you shall not uncover her nakedness.