From Sahih Bukhari (Hadith 2862):
Narrated Anas bin Malik:There was a feeling of fright in Medina, so the Prophet (ﷺ) borrowed a horse called Mandub belonging 'to Abu Talha and mounted it. (On his return), he said, "I did not see anything of fright and I found this horse very fast
Reference: Bukhari 2862