Abdur Rahman bin Mahdi عبد الرحمن بن مهدي · The Book on Jihad

"There was a cause of fright in Al-Madinah. So the Messenger of Allah (ﷺ) borrowed a horse of ours called Mandub. He said: 'I have not seen anything to be frightened of, and we found him to be (quick) like the sea.'" This Hadith is Hasan Sahih.