The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fada'il Al-Sahabah)
Muslim :: Book 31 : Hadith 6123
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: The tribes of Ashja', Ghifar and Muzaina and from the tribe of Juhaina they are better than Banu Tamim, Banu Amir and the allies of Asad and Ghatfan.