Sunan Abu Dawud
404
Sahih+3

Anas b. Malik said the Messenger of Allah (ﷺ) used to say the 'Asr prayer when the sun was high and bright and living, then one would go off to al-'Awali and get there while the sun was still high

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid