Leviticus 18:9-11

International Standard Version

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.

¹⁰ “You are not to have sexual relations with your son’s daughter or your daughter’s daughter. You are not to have sexual relations with them, because their nakedness is your own nakedness.

¹¹ “You are not to have sexual relations with the daughter of your father’s wife. Born of your father, she’s your sister, so you are not to have sexual relations with her.