Sahih Muslim Book 7, Hadith Number 2809.

Chapter : Staying and the significance of the verse: “Then hasten op from where the people hasten on” (ii 199).

Jubair. b. Mut’im reported: I lost my camel and went in search of it on the day of ‘Arafa, and I saw the Messenger of Allah (may peace be upon him) staying along with people in ‘Arafat. Thereupon I said: By Allah, he is among the Hums (Quraish) ; what has happened to him that he has come to this (place)? The Quraish were counted among Hums.