Matthew 5:27-30

27 "You have heard that it was said, 'You shall not commit adultery;'
28 but I tell you that everyone who gazes at a woman to lust after her has committed adultery with her already in his heart.
29 If your right eye causes you to stumble, pluck it out and cast it from you. For it is profitable for you that one of your members should perish, than for your whole body to be cast into Gehinnom.
30 If your right hand causes you to stumble, cut it off, and cast it from you: for it is profitable for you that one of your members should perish, and not your whole body be cast into Gehinnom.