Sahih Muslim | Book 20 | Chapter 25

Narrated by Ibn 'Umar
It has been narrated on the authority of Ibn 'Umar that the Messenger of Allah (may peace be upon him) 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.

Narrated by Abdullah b. 'Umar
This tradition has been handed down through another chain of transmitters with theaddition of the following words from Abdullah b. 'Umar:"I came first in the race and my horse jumped into the mosque with me.