Sahih Bukhari
Prayers (Salat)
Volume: 001 / Book Number: 008 / Hadith Number: 412
Narrated 'Abdullah bin 'Umar:
Allah's Apostle ordered for a horse race; the trained horses were to run from a place called Al-Hafya' to Thaniyat Al-Wada' and the horses which were not trained were to run from Al-Thaniya to the Masjid (mosque of) Bani Zuraiq. The sub narrator added: Ibn Umar was one of those who took part in the race.