Sahih Muslim Book 31, Hadith Number 6121.

Chapter : The merits of the tribes of Ghifir, Ashia’, Muzaina, Tamim, Daws and Tayyi.

Abu Huraira reported Allah’s Messenger (may peace be upon him) as saying: Quraish, Ansar, Muzaina, Juhaina and Ghifar, they are my friends and there is no friend of theirs besides Allah and His Messenger.