Sahih al-Bukhari, Volume 4, Book 52, Hadith 121 (USC-MSA) ⓘ

Narrated `Abdullah: The Prophet arranged for a horse race of the horses which had not been made lean; the area of the race was from Ath-Thaniya to the mosque of Bani Zuraiq. (The sub-narrator said, "`Abdullah bin `Umar was amongst those who participated in that horse race.").

حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا اللَّيْثُ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه أَنَّ النَّبِيَّ صلى الله عليه وسلم سَابَقَ بَيْنَ الْخَيْلِ الَّتِي لَمْ تُضَمَّرْ، وَكَانَ أَمَدُهَا مِنَ الثَّنِيَّةِ إِلَى مَسْجِدِ بَنِي زُرَيْقٍ‏.‏ وَأَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ كَانَ سَابَقَ بِهَا‏.‏ قَالَ أَبُو عَبْد اللَّهِ أَمَدًا غَايَةً فَطَالَ عَلَيْهِمْ الْأَمَدُ