Musnad Ahmad 32:1440

Yunus and Surayj narrated to us, they said: Fulayh narrated to us, from Uthman ibn Abd al-Rahman, that Anas ibn Malik informed him: "The Messenger of Allah (peace be upon him) used to pray the Asr prayer at a time when a person could go to the Banu Harithah ibn al-Harith and return before the sun set, and at a time when a man could slaughter a camel and divide its parts before the sun set. He used to pray the Jumu'ah prayer when the sun would incline. And when he went out to Makkah, he would pray the Dhuhr prayer at al-Shajarah as two rak'ahs."