Sahih Muslim 857
Sahih Muslim · Book 7: The Book of Prayer - Friday · The virtue of one who remains silent and listens attentively during the khutbah
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى ، وَأَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ وَأَبُو كُرَيْبٍ قَالَ يَحْيَى أَخْبَرَنَا وَقَالَ الآخَرَانِ، 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 فَاسْتَمَعَ وَأَنْصَتَ غُفِرَ لَهُ مَا بَيْنَهُ وَبَيْنَ الْجُمُعَةِ وَزِيَادَةُ ثَلاَثَةِ أَيَّامٍ وَمَنْ مَسَّ الْحَصَى فَقَدْ لَغَا " .
He who performed ablution well, then came to Friday prayer, listened (to the sermon), kept silence all (his sins) between that time and the next Friday would be forgiven with three days extra, and he who touched pebbles caused an interruption.