The Mudabbar hadith Malik's Muwatta

Malik related to me from Yahya ibn Said that Said ibn al-Musayyab said, "I have heard that the Messenger of Allah, may Allah bless him and 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 better for you.' " Yahya ibn Said said, "I related this hadith in an assembly among whom was Yazid ibn Nuaym ibn Hazzal al-Aslami. Yazid said, 'Hazzal was my grandfather. This hadith is true.' "