Sunan Ibn Majah, Volume 2, Book 5, Hadith 1110 (DarusSalam) ⓘ
It was narrated from Abu Hurairah that the Prophet said: “If you say to your companions: ‘Be quiet’ on a Friday while the Imam is delivering the sermon, you have engaged in Laghw (idle talk or behaviour).”
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا شَبَابَةُ بْنُ سَوَّارٍ، عَنِ ابْنِ أَبِي ذِئْبٍ، عَنِ الزُّهْرِيِّ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ قَالَ " إِذَا قُلْتَ لِصَاحِبِكَ أَنْصِتْ يَوْمَ الْجُمُعَةِ وَالإِمَامُ يَخْطُبُ فَقَدْ لَغَوْتَ " .
also referenced under: Hadith 1110 (Reference) & Book 5, Hadith 1164 (In-Book)