"The Prophet (ﷺ) rode a horse belonging to Abu Talhah called Mandub. He said: 'There is nothing to be frightened of, and we found him to be (quick) like the sea.'"

There is something on this topic from Ibn 'Amr Al-'As.
Jami` at-Tirmidhi Book 23, Hadith 16
← Previous Hadith "During the year of the conquest, when the Prophet (ﷺ) reached Marr Zahran, he told us that we would meet the enemy. So he ordered us to break the fast, and we broke our fast."

This Hadith is Hasan Sahih, and there is something on this topic from Ibn 'Umar.

Jami` at-Tirmidhi Book 23, Hadith 15 Next Hadith → "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.

Jami` at-Tirmidhi Book 23, Hadith 17