Sayyiduna Abu Huraira (may Allah be pleased with him) narrates this statement of the Noble Prophet (peace and blessings be upon him): "Every human being inevitably commits adultery; the adultery of the eye is looking, the adultery of the hand is touching, the soul desires, and the private part either confirms or denies it."
Hadith Referenceصحیح ابن حبان / كتاب الحدود / 4422
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «الصحيحة» (2804).فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح