Leviticus 20:17-19

New International Version

¹⁷ “‘If a man marries his sister^(A), the daughter of either his father or his mother, and they have sexual relations, it is a disgrace. They are to be publicly removed^(B) from their people. He has dishonored his sister and will be held responsible.^(C)

¹⁸ “‘If a man has sexual relations with a woman during her monthly period,^(D) he has exposed the source of her flow, and she has also uncovered it. Both of them are to be cut off from their people.^(E)

¹⁹ “‘Do not have sexual relations with the sister of either your mother or your father,^(F) for that would dishonor a close relative; both of you would be held responsible.