(12) باب غَايَةِ السَّبَقِ لِلَّتِي لَمْ تُضْمَرْ
It was narrated from Ibn 'Umar that the Messenger of Allah organized a horse race and sent them from Al-Hafya' and its finish line was Thaniyyat Al-Wada'; and he organized a race for horses that had not been made lean, and the course stretched from Ath-Thaniyyah to the Masjid of Banu Zuraiq.
Reference: Sunan an-Nasa'i 3583
In-book reference: Book 28, Hadith 23
English translation: Vol. 4, Book 28, Hadith 3613