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 6110
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying in a large gathering of the Muslims: Should I not tell you of the best clans of the Ansar? They said: Allah's Messenger, (kindly) do this. Thereupon Allah's Messenger said: That is Banu Abd al-Ashhal. They said: Allah's Messenger, then next? He said: Banu Najjar. They again said: Allah's Messenger, then next? He said: Then of Banu Harith b. Khazraj. They then said: Allah's Messenger, then next? He said. Then of Banu Sa'ida. They said: Allah's Messenger, then next? He said: There is good in all the clans of the Ansar. It was upon this that Sa'd b. Ubida stood up in annoyance and said: Are we the last of the four as Allah's Messenger (may peace be upon him) has determined (the order of precedence) of their clans? He decided to talk with Allah's Messenger (may peace be upon him) on this issue, but the people Of his tribe said to him: Be seated, are you not happy with this that Allah's Messenger' (may peace be upon him) has mentioned your clan as one of the four (best) clans and those whom he left and did not mention (the order of their precedence) are more than those whom he mentioned? And Sa'd b. 'Ubada dropped the idea of talking to Allah's Messenger (may peace be upon him) (on this issue).