When the Prophet (SAWA) was digging the trench [with his companions], they hit upon a large rock, so the Prophet (SAWA) took the pickaxe from the Commander of the Faithful 'All (AS)'s hand or Salman's hand and hit the rock with a blow that shattered it into three pieces. So The Prophet (SAWA) said, 'With this blow of mine, the treasures of the Khosrau and the Caesar have been opened to me', upon which one man said to his companions, 'He gives us promises of the treasures of the Khosrau and the Caesar [with his strength], whilst neither one of us even has the ability to go and relieve himself.'