Leviticus 18:9-11

Common English Bible

⁹ You must not have sexual contact with your sister—regardless of whether she is your father’s daughter or your mother’s daughter, whether born into the same household as you or outside it. ¹⁰ You must not have sexual contact with your son’s daughter or your daughter’s daughter, because their nakedness is your own nakedness.^{[a] 11} You must not have sexual contact with the daughter of your father’s wife, who was born into your father’s family; she is your sister.