Leviticus 18:9-11

New Living Translation

⁹ “Do not have sexual relations with your sister or half sister, whether she is your father’s daughter or your mother’s daughter, whether she was born into your household or someone else’s.

¹⁰ “Do not have sexual relations with your granddaughter, whether she is your son’s daughter or your daughter’s daughter, for this would violate yourself.

¹¹ “Do not have sexual relations with your stepsister, the daughter of any of your father’s wives, for she is your sister.