Sahih Bukhari Volume 4, Book 52, Hadith Number 120.

Narated By ‘Abdullah bin ‘Umar : The Prophet 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.”