Sahih al-Bukhari 3212

ʿAli ibn ʿAbd Allah narrated to us: Sufyan narrated to us: al-Zuhri narrated to us, from Saʿid ibn al-Musayyab, who said: ʿUmar passed through the mosque while Hassan was reciting poetry. He said, ‘I used to recite poetry in it, when someone better than you was there.’ Then he turned to Abu Hurayra and said, ‘I adjure you by Allah: did you hear the Messenger of Allah (ﷺ) say, “Answer on my behalf; O Allah, strengthen him with the Holy Spirit”?’ He said, ‘Yes.’