ENOfficial
It was narrated from 'Amr bin Shu'aib, from his father, from his grandfather, that the Prophet (ﷺ) forbade reciting poetry in the Masjid.
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ بْنُ سَعْدٍ، عَنِ ابْنِ عَجْلاَنَ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم نَهَى عَنْ تَنَاشُدِ الأَشْعَارِ فِي الْمَسْجِدِ .
sunnah.com