(13) باب إِضْمَارِ الْخَيْلِ لِلسَّبْقِ
It was narrated from Ibn 'Umar that the Messenger of Allah organized a race for horses that had been made lean, from Al-Hafya' and its finish line was Thaniyyat Al-Wada', and he organized another race for horses that had not been made lean, from Ath-Thaniyyah to the Masjid of Banu Zuraiq, and 'Abdullah was among those who took part in the race.
Reference: Sunan an-Nasa'i 3584
In-book reference: Book 28, Hadith 24
English translation: Vol. 4, Book 28, Hadith 3614