Sahih al-Bukhari 3067
صحيح البخاري#3067Sahihقَالَ ابْنُ نُمَيْرٍ حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ ذَهَبَ فَرَسٌ لَهُ، فَأَخَذَهُ الْعَدُوُّ، فَظَهَرَ عَلَيْهِ الْمُسْلِمُونَ فَرُدَّ عَلَيْهِ فِي زَمَنِ رَسُولِ اللَّهِ صلى الله عليه وسلم، وَأَبَقَ عَبْدٌ لَهُ فَلَحِقَ بِالرُّومِ، فَظَهَرَ عَلَيْهِمُ الْمُسْلِمُونَ، فَرَدَّهُ عَلَيْهِ خَالِدُ بْنُ الْوَلِيدِ بَعْدَ النَّبِيِّ صلى الله عليه وسلم.
Narrated Nafi' (ra):A horse of Ibn 'Umar fled and the enemy took it. Then the Muslims conquered the enemy and the horse was returned to him during the lifetime of Allah's Messenger (ﷺ). And also, once a slave of Ibn 'Umar (ra) fled and joined the Byzantines, and when the Muslims conquered them, Khalid bin Al-Walid returned the slave to him after the death of the Prophet (ﷺ)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 56:272