Prayer (Kitab Al-Salat): Details of Commencing Prayer
Dawud :: Book 3 : Hadith 934
Narrated AbuHurayrah:
When the Apostle of Allah (peace_be_upon_him) recited the verse "Not of those with whom Thou art angry, nor of those who go astray," he would say Amin so loudly that those near him in the first row would hear it.