"You have heard that it was said, 'Do not commit adultery.'
References for Matthew 5:27
But I say to you that everyone who looks at a woman to lust for her has already committed adultery with her in his heart.
And if your right eye causes you to sin, tear it out and throw [it] from you! For it is better for you that one of your members be destroyed than your whole body be thrown into hell.
And if your right hand causes you to sin, cut it off and throw [it] from you! For it is better for you that one of your limbs be destroyed than your whole body go into hell.