Musnad Ahmad 788:246

'Abd al-Samad narrated to us, he said: Abu Daris, the companion of al-Jawr, narrated to us, he said: Abu Burdah ibn Abi Musa narrated to us, from Abu Musa, that he saw the Prophet, peace and blessings of Allah be upon him, praying two rak'ahs after the 'Asr prayer.