Abu Dawud
Prayer
Book Number: 002 / Hadith Number: 745
Narated By AbuHurayrah : If I were in front of the Prophet (pbuh), I would see his armpits. Ibn Mu'adh added that Lahiq said: Do you not see, AbuHurayrah could not stand in front of the Prophet (pbuh) while he was praying. Musa added: When he uttered the takbir, he raised his hands.