Sahih Bukhari Volume 005, Book 059, Hadith Number 697.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 59. Military Expeditions Led by the Prophet (PBUH) (Al-Maghaazi)
Narrated By Hisham's father : In my presence, Usama was asked about the speed of the Prophet during his Hajj. He replied, "It was Al-'Anaq (i.e. moderate easy speed) and if he encountered an open space, he used to increase his speed."