Sahih Bukhari Volume 008, Book 073, Hadith Number 231.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 73. Good Manners and Form (Al-Adab)
Narated By Anas bin Malik : There was a state of fear in Medina. Allah's Apostle rode a horse belonging to Abu Talha (in order to see the matter). The Prophet said, "We could not see anything, and we found that horse like a sea (fast in speed)."