Leviticus 18:5-7

New Catholic Bible

⁵ You shall keep my ordinances and my statutes. He who obeys them shall live by them. I am the Lord, your God.

⁶ “ ‘None of you is to be intimate with any of your close relatives, to uncover their nakedness. I am the Lord. ⁷ You shall not uncover the nakedness of your father or your mother. She is your mother; you shall not uncover her nakedness.