Sunan an-Nasa'i 716
سنن النسائي#716Sahihأَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، قَالَ مَرَّ عُمَرُ بِحَسَّانَ بْنِ ثَابِتٍ وَهُوَ يُنْشِدُ فِي الْمَسْجِدِ فَلَحَظَ إِلَيْهِ فَقَالَ قَدْ أَنْشَدْتُ وَفِيهِ مَنْ هُوَ خَيْرٌ مِنْكَ ثُمَّ الْتَفَتَ إِلَى أَبِي هُرَيْرَةَ فَقَالَ أَسَمِعْتَ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " أَجِبْ عَنِّي اللَّهُمَّ أَيِّدْهُ بِرُوحِ الْقُدُسِ " . قَالَ اللَّهُمَّ نَعَمْ .
It 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
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: 8:29