Leviticus 18:7-9

New International Version - UK

⁷ ‘“Do not dishonour your father by having sexual relations with your mother. She is your mother; do not have relations with her.

⁸ ‘“Do not have sexual relations with your father’s wife; that would dishonour your father.

⁹ ‘“Do not have sexual relations with your sister, either your father’s daughter or your mother’s daughter, whether she was born in the same home or elsewhere.