Sahih Bukhari
Holding Fast to the Quran and Sunnah
Volume: 009 / Book Number: 092 / Hadith Number: 429
Narrated Anas bin Malik:
Allah's Apostle used to perform the 'Asr prayer and then one could reach the 'Awali (a place in the outskirts of Medina) while the sun was still quite high.
Narrated Yunus: The distance of the 'Awali (from Medina) was four or three miles.