The Book of the Times (of Prayer)
6/8. Chapter:
Hastening To Pray 'Asr
Sunan an-Nasai
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنِ ابْنِ شِهَابٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّهُ أَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يُصَلِّي الْعَصْرَ وَالشَّمْسُ مُرْتَفِعَةٌ حَيَّةٌ وَيَذْهَبُ الذَّاهِبُ إِلَى الْعَوَالِي وَالشَّمْسُ مُرْتَفِعَةٌ .
It was narrated that Anas bin Malik said: "The Messenger of Allah (ﷺ) used to pray 'Asr when the sun was still high and bright, and a person could go to Al-'Awali [1] when the sun was still high." [1] Al-'Awali is the southern most district of Al-Madinah, and it is very big. Its nearest limit is at a distance of about two miles from the center of Al-Madinah. While its furthest limit is about eight miles.
Reference : Sunan an-Nasa'i 507In-book reference : Book 6, Hadith 14English translation : Vol. 1, Book 6, Hadith 508