Leviticus 18:17-19

New Century Version

¹⁷ “‘You must not have sexual relations with both a woman and her daughter. And do not have sexual relations with this woman’s granddaughter, either the daughter of her son or her daughter; they are her close relatives. It is evil to do this.

¹⁸ “‘While your wife is still living, you must not take her sister as another wife. Do not have sexual relations with her.

¹⁹ “‘You must not go near a woman to have sexual relations with her during her monthly period, when she is unclean.