It was narrated from ‘Amr bin Shu’aib, from his father, from his grandfather, that the Messenger of Allah ﷺ forbade sitting in circles in the mosque on Fridays before the prayer.  

أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى أَنْ يُحَلَّقَ فِي الْمَسْجِدِ يَوْمَ الْجُمُعَةِ قَبْلَ الصَّلاَةِ  

“The Messenger of Allah ﷺ forbade Ihtiba’ (sitting with one's thighs gathered up against the stomach while wrapping one's arm or garment around them) on Fridays, meaning, when the Imam is delivering the sermon.”  

نَهَى رَسُولُ اللَّهِ ﷺ عَنْ الاِحْتِبَاءِ يَوْمَ الْجُمُعَةِ يَعْنِي وَالإِمَامُ يَخْطُبُ