Leviticus 20:11-12

¹¹If a man sleepeth with his step-dame, and showeth his father’s shame, both they die by death; their blood be on them. (If a man sleepeth with his step-mother, and uncovereth her nakedness, which is for his father alone, they both shall be put to death; their blood be on them.)

¹²If any man sleepeth with his son’s wife, ever either die, for they have wrought great sin, (or they both shall be put to death, for they have done a great sin); their blood be on them.