Messenger of Allah prohibited the recitation of poetry in the Masjid, and from selling and buying in it, and (he prohibited) the people from forming circles in it on Friday before the Salat."  

عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ نَهَى عَنْ تَنَاشُدِ الأَشْعَارِ فِي الْمَسْجِدِ وَعَنِ الْبَيْعِ وَالاِشْتِرَاءِ فِيهِ وَأَنْ يَتَحَلَّقَ النَّاسُ فِيهِ يَوْمَ الْجُمُعَةِ قَبْلَ الصَّلاَةِ قَالَ وَفِي الْبَابِ عَنْ بُرَيْدَةَ وَجَابِرٍ وَأَنَسٍ