Amr bin al-Sharid narrates from his father (may Allah be pleased with him): The Prophet (peace and blessings be upon him) seated me behind him (on his mount) and said: "Do you remember any of the poetry of Umayyah bin Abi al-Salt?" I said: Yes. He said: "Recite." He says: I recited a verse, and he said: "Recite more," until I had recited a hundred verses.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 21028