Sunan Ibn Majah, Volume 4, Book 24, Hadith 2847 (DarusSalam) ⓘ

It was narrated that Ibn ‘Umar said that a horse of his went out and the enemy captured it. Then the Muslims defeated them and it was returned to him. (That was) during the time of the Messenger of Allah. 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.”

حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ ذَهَبَتْ فَرَسٌ لَهُ فَأَخَذَهَا الْعَدُوُّ فَظَهَرَ عَلَيْهِمُ الْمُسْلِمُونَ فَرُدَّ عَلَيْهِ فِي زَمَنِ رَسُولِ اللَّهِ صلى الله عليه وسلم ‏.‏ قَالَ وَأَبَقَ عَبْدٌ لَهُ فَلَحِقَ بِالرُّومِ فَظَهَرَ عَلَيْهِمُ الْمُسْلِمُونَ فَرَدَّهُ عَلَيْهِ خَالِدُ بْنُ الْوَلِيدِ بَعْدَ وَفَاةِ رَسُولِ اللَّهِ صلى الله عليه وسلم ‏.‏