Sunan an-Nasa'i 716
سنن النسائي#716SahihIt was narrated that Sa'eed bin Al-Musayyab said:"Umar passed by Hassan bin Thabit while he was reciting poetry in the Masjid, and glared at him. He said: 'I recited poetry when there was someone better than you in the Masjid.' Then he turned to Abu Hurairah and said: 'Did you not hear the Messenger of Allah (ﷺ) when he said: "Answer back on my behalf. O Allah, help him with the Holy Spirit!'" He said: 'Yes, by Allah
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 8:29