It is narrated from Anas bin Malik (may Allah be pleased with him) that he states: The Messenger of Allah (ﷺ) would perform the Asr prayer while the sun was still white and shining. Then, if someone set out towards Awali (the settlements located on the upper side outside of Madinah), he would reach there and the sun would still be high.
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 137
Hadith Takhrijأخرجه البخارى مواقيت الصلاة، باب وقت العصر (550) (551) - ومسلم، المساجد، باب استحباب التكبير بالعصر (621).