Sunan Abi Dawud, Hadith 2147

Ibn ‘Abbas said “I did not see anything more resembling to minor sins than what Abu Hurairah reported from the Prophet who said “Allaah has decreed for the children of Adam a share in adultery, he will get it by all means, the adultery of eyes is looking; the adultery of tongue is speaking; the soul desires and has a passion; the private parts confirms or falsifies it.”

حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدٍ، حَدَّثَنَا ابْنُ ثَوْرٍ، عَنْ مَعْمَرٍ، أَخْبَرَنَا ابْنُ طَاوُسٍ، عَنْ أَبِيهِ، عَنِ ابْنِ عَبَّاسٍ، قَالَ مَا رَأَيْتُ شَيْئًا أَشْبَهَ بِاللَّمَمِ مِمَّا قَالَ أَبُو هُرَيْرَةَ عَنِ النَّبِيِّ صلى الله عليه وسلم ‏ "‏ إِنَّ اللَّهَ كَتَبَ عَلَى ابْنِ آدَمَ حَظَّهُ مِنَ الزِّنَا أَدْرَكَ ذَلِكَ لاَ مَحَالَةَ فَزِنَا الْعَيْنَيْنِ النَّظَرُ وَزِنَا اللِّسَانِ الْمَنْطِقُ وَالنَّفْسُ تَمَنَّى وَتَشْتَهِي وَالْفَرْجُ يُصَدِّقُ ذَلِكَ وَيُكَذِّبُهُ ‏" ‏ ‏.‏

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also referenced under: Hadith 2152 (DarusSalam)