You are not to have sexual intercourse with your sister, either your father’s daughter or your mother’s, whether born at home or born elsewhere. You are not to have sex with her.
If a man marries his sister, whether his father’s daughter or his mother’s daughter, and they have sexual relations, , it is a disgrace. They are to be cut off publicly from their people. He has had sexual intercourse with his sister; he will bear his iniquity.
One man within you commits a detestable act with his neighbour’s wife; another defiles his daughter-in-law with depravity; and yet another violates his sister, his father’s daughter.