أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَخْبَرَنِي يَحْيَى بْنُ سَعِيدٍ، عَنِ ابْنِ عَجْلاَنَ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم نَهَى عَنِ التَّحَلُّقِ يَوْمَ الْجُمُعَةِ قَبْلَ الصَّلاَةِ وَعَنِ الشِّرَاءِ وَالْبَيْعِ فِي الْمَسْجِدِ ‏.‏

It was narrated from 'Amr bin Shu'aib, from his father, from his grandfather, that the Prophet (PBUH) forbade sitting in circles on Friday before Jumu'ah prayer, and buying and selling in the Masjid. Translation Not Available

Book Ref: Sunan An Nisai Book 8 Hadith 714
Web Ref:  Sunan An Nisai Vol 1 Book 8 Hadith 715