Leviticus 18:7-9

International Standard Version

⁷ “Neither your father’s nakedness nor your mother’s nakedness is to be exposed. She’s your mother, so you are not to have sexual relations with her.

⁸ “You are not to have sexual relations with your father’s wife. It’s your own father’s nakedness.

⁹ “You are not to have sexual relations with your sister, whether she’s your father’s daughter or your mother’s daughter, whether she’s born in your home or outside your home. You are not to have sexual relations with her.