It wasnarrated that Ibn 'Umar said that a horse of his went out and theenemy captured it. Then the Muslims defeated them and it was returnedto him. (That was) during the time of the Messenger of Allah (ﷺ).He said:
"And a slave of his absconded and joined up with the Romans, then the Muslims defeated them, and Khalid bin Walid returned him to me, after the death of the Messenger of Allah (ﷺ)."
English reference: Vol. 4, Book 24, Hadith 2847
Arabic reference: Book 24, Hadith 2955