Narrated Abdullah:
The Prophet arranged for a horse race of the horses which had not been made lean; the area of theĀ race was from Ath-Thaniya to the mosque of Bani Zuraiq. (The sub-narrator said, “‘Abdullah binĀ ‘Umar was amongst those who participated in that horse race.”).
Sahih Bukhari, Volume 4, Book52, Number 121