You must not have sexual intercourse with both a woman and her daughter; you must not take as wife either her son's daughter or her daughter's daughter to have intercourse with them. They are closely related to her -- it is lewdness.

You must not expose the nakedness of your son's daughter or your daughter's daughter by having sexual intercourse with them, because they are your own nakedness.

and his virgin sister who is near to him, who has no husband; he may defile himself for her.

He must take a wife who is a virgin.

He must not marry a widow, a divorced woman, or one profaned by prostitution; he may only take a virgin from his people as a wife.

You must not have sexual intercourse with your sister, whether she is your father's daughter or your mother's daughter, whether she is born in the same household or born outside it; you must not have sexual intercourse with either of them.