Jami` at-Tirmidhi 498
Abu Hurairh narrated that :
Allah's Messenger said: "Whoever performs Wudu, performing his Wudu well, then he comes to the Friday (prayer), and he gets close, listens and is silent, then whatever (sin) was between that and (the last) Friday are forgiven for him, in addition to three days. And whoever touches the pebbles, he has committed Lagha (useless activity)."
حَدَّثَنَا هَنَّادٌ، قَالَ حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، عَنْ أَبِي صَالِحٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏
"‏ مَنْ تَوَضَّأَ فَأَحْسَنَ الْوُضُوءَ ثُمَّ أَتَى الْجُمُعَةَ فَدَنَا وَاسْتَمَعَ وَأَنْصَتَ غُفِرَ لَهُ مَا بَيْنَهُ وَبَيْنَ الْجُمُعَةِ وَزِيَادَةُ ثَلاَثَةِ أَيَّامٍ وَمَنْ مَسَّ الْحَصَى فَقَدْ لَغَا ‏"‏ ‏.‏ قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ ‏.‏