Narrated 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)."
— Sahih Bukhari, Volume 8, Book 73: Good Manners and Form (Al-Adab), Hadith #231