Leviticus 18:12-17

12You must not have sexual intercourse with your father’s sister; she is your father’s flesh.

13You must not have sexual intercourse with your mother’s sister, because she is your mother’s flesh.

14You must not expose the nakedness of your father’s brother; you must not approach his wife to have sexual intercourse with her. She is your aunt.

15You must not have sexual intercourse with your daughter-in-law; she is your son’s wife. You must not have intercourse with her.

16You must not have sexual intercourse with your brother’s wife; she is your brother’s nakedness.

17You 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.