¹⁶ If a woman approaches any kind of animal to mate with it, you must kill the woman and the animal. They must be executed; their blood is on their own heads. ¹⁷ If a man marries his sister—his father’s daughter or his mother’s daughter—and they have sexual contact with each other, it is a disgrace. They will be cut off in the sight of their people. Such a man has had sexual contact with his sister; he will be liable to punishment. ¹⁸ If a man sleeps with a woman during her menstrual period and has sexual contact with her, he has exposed the source of her blood flow and she has uncovered the same. Both of them will be cut off from their people.