Malik related to me from Yahya ibn Said that Said ibn al-Musayyabsaid, "I have heard that the Messenger of Allah, may Allah bless himand grant him peace, said to a man from the Aslam tribe called Hazzal,'Hazzal, had you veiled him with your cloak, it would have been betterfor you.' "Yahya ibn Said said, "I related this hadith in anassembly among whom was Yazid ibn Nuaym ibn Hazzal al-Aslami. Yazidsaid, 'Hazzal was my grandfather. This hadith is true.' "
USC-MSA web (English) reference: Book 41, Hadith 3
Arabic reference: Book 41, Hadith 1505