حَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ، حَدَّثَنَا عُقْبَةُ بْنُ خَالِدٍ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ النَّبِيَّ صلى الله عليه وسلمسَبَّقَ بَيْنَ الْخَيْلِ وَفَضَّلَ الْقُرَّحَ فِي الْغَايَةِ ‏.‏
Translation
Narrated Abdullah ibn Umar

The Prophet (ﷺ) held a race between the horses and gave a longer distance to the horses that had reached the fifth year (starting their sixth).