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‘Abd Allah bin Umar said “The Messenger of Allah(ﷺ) held race between the horses which had been made lean by training from Al Hafya’. The goal was Thaniyyat Al Wada’ and he held a race between the horses Banu Zuraiq and ‘Abd Allaah was one of the racers.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم سَابَقَ بَيْنَ الْخَيْلِ الَّتِي قَدْ ضُمِّرَتْ مِنَ الْحَفْيَاءِ وَكَانَ أَمَدُهَا ثَنِيَّةَ الْوَدَاعِ وَسَابَقَ بَيْنَ الْخَيْلِ الَّتِي لَمْ تُضْمَرْ مِنَ الثَّنِيَّةِ إِلَى مَسْجِدِ بَنِي زُرَيْقٍ وَإِنَّ عَبْدَ اللَّهِ كَانَ مِمَّنْ سَابَقَ بِهَا .
sunnah.com