In Mina, pilgrims have to offer a hajj ritual of stoning the devil ‘Jamarat’ in which they are to recite a duaa while stoning the devil. There exit three Jamarat (the images of devil in wall: previously in pillars) and every time you through or hit the stone to them, you have to say a dua.

As did our beloved Prophets Muhammad SAAW, every time he through pebble at any of the three jamarat, he would say,

“Allah is the greatest.”

allaahu akbar

On completion of the first jamarah, Prophet SAAW advanced a little, stood facing the Qiblah and Kaba, raised his hands and supplicated. As same in second Jamarah, but not the same in third one. So we have to follow Him SAAW and his Sunnah (the way).