Bismillahir Rahmanir Rahim.
Ibn Abbas (RadiAllahu anhu) se rivayat hay, hame pata lag jata ki Allah ke Rasool (Sallallahu Alaihi Wa sallam) ne Namaz puri karli jab ham “Allahu Akbar” ki aawaz sunte.
Hadith English: Ibn Abbas (Radi allahu anhu) said, we used to know that Allah’s messenger (Sallallahu Alaihi Wasallam) had finished his prayer when we heard “Allahu Akbar”.
[Sahih Muslim vol. 1, 1209/1210, Bukhari Vol.1 Book 12/802]