Matthew 5:27-29 (New International Version)

Adultery

 ²⁷"You have heard that it was said, 'Do not commit adultery.'^{[a] 28}But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart. ²⁹If your right eye causes you to sin, gouge it out and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell.