Sahih Muslim , Book 33, Hadith 6422 (USC-MSA) ⓘ

Abu Huraira reported Allah's Messenger as saying. Allah fixed the very portion of adultery which a man will indulge in. There would be no escape from it. The adultery of the eye is the lustful look and the adultery of the ears is listening to voluptuous (song or talk) and the adultery of the tongue is licentious speech and the adultery of the hand is the lustful grip (embrace) and the adultery of the feet is to walk (to the place) where he intends to commit adultery and the heart yearns and desires which he may or may not put into effect.

حَدَّثَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، أَخْبَرَنَا أَبُو هِشَامٍ الْمَخْزُومِيُّ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا سُهَيْلُ بْنُ أَبِي صَالِحٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ كُتِبَ عَلَى ابْنِ آدَمَ نَصِيبُهُ مِنَ الزِّنَى مُدْرِكٌ ذَلِكَ لاَ مَحَالَةَ فَالْعَيْنَانِ زِنَاهُمَا النَّظَرُ وَالأُذُنَانِ زِنَاهُمَا الاِسْتِمَاعُ وَاللِّسَانُ زِنَاهُ الْكَلاَمُ وَالْيَدُ زِنَاهَا الْبَطْشُ وَالرِّجْلُ زِنَاهَا الْخُطَا وَالْقَلْبُ يَهْوَى وَيَتَمَنَّى وَيُصَدِّقُ ذَلِكَ الْفَرْجُ وَيُكَذِّبُهُ ‏" ‏ ‏.‏