Leviticus 20:19-20

New International Version

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

²⁰ “‘If a man has sexual relations with his aunt,^(B) he has dishonored his uncle. They will be held responsible; they will die childless.^(C)