Musannaf Ibn Abi Shayba 3:890

Abu Mu'awiyah narrated to us, from al-A'mash, from Masruq, who said: When the sun passed its zenith, Abu Musa came and said, "Where is your companion? This is the time for this prayer." He did not tarry long before 'Abdullah came quickly, and he prayed the Dhuhr prayer.