It has been narrated on the authority of Ibn 'Umar that the Messenger of Allah ﷺ had a race of the horses which had been especially prepared for the purpose from Hafya' to Thaniyyat al-Wada' (the latter being the winning post), and of those which had not been trained from Thaniyya to the mosque of Banu Zuraiq, and Ibn Umar was among those who took part in this race. (Using translation from Muslim 1870a)   

«كَانَ رَسُولُ اللَّهِ ﷺ يُسَابِقُ بَيْنَ الْخَيْلِ الْمُضَمَّرَةِ مِنَ الْحَفْيَاءِ إِلَى الثَّنِيَّةِ وَالَّتِي لَمْ تُضَمَّرْ مِنَ الثَّنِيَّةِ إِلَى مَسْجِدِ بَنِي زُرَيْقٍ وَأَنَّ ابْنَ عُمَرَ كَانَ فِيمَنْ سَابَقَ بِهَا»