كتاب المساجد
Read the English translation first, with the original Arabic directly underneath.
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.'"
أَجِبْ عَنِّي اللَّهُمَّ أَيِّدْهُ بِرُوحِ الْقُدُسِ