Sahih Bukhari
Sahih Bukhari Volume 001, Book 008, Hadith Number 412.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 08. Prayers (Salat)
Narated By '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.