Matthew 5:27-29

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