Sahih Muslim | Book 20 | Hadith Number 4584

Narrated by It has been narrated on the authority of 'Abdullah b. Abu Aufa who
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.