Abu Huraira reported Messenger of Allah ﷺ 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. (Using translation from Muslim 2658a)
عَنْ رَسُولِ اللَّهِ ﷺ قَالَ «عَلَى كُلِّ نَفْسٍ مِنِ ابْنِ آدَمَ كُتِبَ حَظٌّ مِنَ الزِّنَا أَدْرَكَ ذَلِكَ لَا مَحَالَةَ فَالْعَيْنُ زِنَاهَا النَّظَرُ وَالرِّجْلُ زِنَاهَا الْمَشْيُ وَالْأُذُنُ زِنَاهَا السَّمَاعُ وَالْيَدُ زِنَاهَا الْبَطْشُ وَاللِّسَانُ زِنَاهُ الْكَلَامُ وَالْقَلْبُ يَتَمَنَّى وَيَشْتَهِي وَيُصَدِّقُ ذَلِكَ أَوْ يُكَذِّبُهُ الْفَرْجُ»