His distinctive, booming voice and orchestrated slogans became a hallmark of the Friday prayer events, inspiring both awe and collective energy among attendees. Mahmoud Mortezaeifar (1934 – 10 May 2013) was a prominent religious and cultural figure in post-revolutionary, widely recognized for his role in shaping the atmosphere of the Friday prayers in Tehran and for popularizing religious slogans as a unifying force during pivotal moments in the nation’s modern history.