I never prayed behind anyone whose prayer was lighter than the prayer of the Messenger of Allah ﷺ, yet it was complete.
ما صليت خلف أحد أخف من صلاة رسول الله ﷺ في تمام.
Bazzar (2770) narrated it from Ammar bin Khalid Wasiti, who said, Qasim bin Malik Muzani told us, Abu Malik Ashjai told us, from his father, who said... and he mentioned it.Its chain is hasan because of Qasim bin Malik Muzani, for he is hasan al-hadith. Abu Malik Ashjai's name is Saad bin Tariq bin Ashim Ashjai.