Musnad Abu Ya'la al-Mawsili 112:32

Musa ibn Muhammad ibn Hayyan narrated to us, Muhammad ibn Abi ‘Adi narrated to us, from Ash’ath, from al-Hasan, from Anas, who said: I have not prayed behind anyone after the Messenger of Allah (may Allah bless him and grant him peace) who was more complete in prayer and more concise than the Messenger of Allah (may Allah bless him and grant him peace).