‏الإمارة : Hadeeth No:4584 It has been narrated on the authority of 'Abdullah b. Abu Aufa who said: The Companions of the Tree (i e. those who swore fealty under the tree) were one thousand and three hundred, and the people of Aslam tribe were one-eighth of the Muhajirs....

‏الإيمان : Hadeeth No:69 A similar hadith has been reported on the authority of Anas (with another chain of transmitters) with the exception of these words: that he again becomes a Jew or a Christian....