Sunan an-Nasa'i 714
سنن النسائي#714Hasanأَخْبَرَنَا 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 (ﷺ) forbade sitting in circles on Friday before Jumu'ah prayer, and buying and selling in the Masjid
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 8:27