Matthew 5:27-29

27Ye have heard that it was said to them of old time, Thou shalt not commit adultery: 28But I say to you, That whoever looketh on a woman to lust after her hath committed adultery with her already in his heart. 29And if thy right eye shall cause thee to sin, pluck it out, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell.1