(56) باب السَّبْقِ بَيْنَ الْخَيْلِ
Narrated (`Abdullah) bin `Umar:
The Prophet (ﷺ) arranged for a horse race amongst the horses that had been made lean to take place between Al-Hafya'' and Thaniyat Al-Wada` (i.e. names of two places) and the horses which had not been mad.? lean from Ath-Thaniyat to the mosque of Bani Zuraiq. I was also amongst those who took part in that horse race. Sufyan, a sub-narrator, said, "The distance between Al-Hafya and Thaniya Al- Wada` is five or six miles; and between Thaniya and the mosque of Bani Zuraiq is one mile."
Reference: Sahih al-Bukhari 2868
In-book reference: Book 56, Hadith 84
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 52, Hadith 120