From Sahih Bukhari (Hadith 2869):
Narrated `Abdullah:The Prophet (ﷺ) 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)
Reference: Bukhari 2869