Sahih Bukhari Volume 4, Book 56, Hadith Number 707.

Narated By Abu Huraira : Allah’s Apostle said, “The tribe of Quraish, the Ansar, the (people of the tribe of) Julhaina, Muzaina, Aslam, Ashja’, and Ghifar are my disciples and have no protectors except Allah and His Apostle.”