Leviticus 18:9-11

New Century Version

⁹ “‘You must not have sexual relations with your sister, either the daughter of your father or your mother. It doesn’t matter if she was born in your house or somewhere else.

¹⁰ “‘You must not have sexual relations with your son’s daughter or your daughter’s daughter; that would bring shame on you.

¹¹ “‘If your father and his wife have a daughter, she is your sister. You must not have sexual relations with her.