Sahih Muslim Book 7, Hadith Number 2903.

Chapter : Excellence of walking at a quick pace in Tawaf and Umra and on the occasion of first Tawaf in Hajj.

Abu Tufail reported; I said to Ibn ‘Abbas (Allah be pleased with them): I think that I saw Allah’s Messenger (may peace be upon him). He (Ibn ‘Abbas) said’ Give a description of him to me. I said: I saw him near al-Marwa on the back of a she-camel, and people had thronged around him. Thereupon Ibn ‘Abbas said: It was Allah’s Messenger (may peace be upon him) for they (the Companions of the Holy Prophet) were neither pushed aside from him, nor were they turned away.