Ibn 'Umar (RAA) narrated, 'The Messenger of Allah (ﷺ) held a horse race, with horses that had been made lean by training, from al-Hafiya to Thanyat al-Wada' (names of two places) and he held a race from Thanyat- alWada' to the mosque of Banu Zuraiq between the horses which had not undergone such training.' Ibn 'Umar was among those who took part in that race. Agreed upon. Al-Bukhari added:
Sufian said, 'From al·Hafiya' to Thanyat al-Wada' is a distance of live or six miles and from Thanyat- al-Wada' to the mosque of Banu Zuraiq is a distance of one mile.'
English reference: Book 11, Hadith 1354
Arabic reference: Book 11, Hadith 1328