366.Hadhrat Abu Hurairah (Allah be pleased with him) narrates that the Prophet (peace be upon him) said: "The fornication of the eyes is to look with lust; the fornication of the tongue is to speak lustful things; the fornication of the hands is to touch with lust; the fornication of the feet is to walk towards lust; the fornication of the heart is to desire evil;..."
(Muslim)
(Hayaat-ul-Muslimeen. by Mohammad Ashraf Ali Thanvi).