Al-Adab Al-Mufrad, Book 36, Hadith 869 (English) ⓘ

Ash-Sharid said, "The Prophet, may Allah bless him and grant him peace, asked me to recite the poetry of Umayya ibn Abi's-Salt and I recited it. The Messenger of Allah, may Allah bless him and grant him peace, began to say, 'Go on, go on!' until I had recited a hundred lines.' The Prophet said, 'If only he had become Muslim.'"

حَدَّثَنَا أَبُو نُعَيْمٍ، قَالَ‏:‏ حَدَّثَنَا عَبْدُ اللهِ بْنُ عَبْدِ الرَّحْمَنِ بْنِ يَعْلَى قَالَ‏:‏ سَمِعْتُ عَمْرَو بْنَ الشَّرِيدِ، عَنِ الشَّرِيدِ قَالَ‏:‏ اسْتَنْشَدَنِي النَّبِيُّ صلى الله عليه وسلم شِعْرَ أُمَيَّةَ بْنِ أَبِي الصَّلْتِ، وَأَنْشَدْتُهُ، فَأَخَذَ النَّبِيُّ صلى الله عليه وسلم يَقُولُ‏:‏ هِيهِ، هِيهِ حَتَّى أَنْشَدْتُهُ مِئَةَ قَافِيَةٍ، فَقَالَ‏:‏ إِنْ كَادَ لَيُسْلِمُ‏.‏