One day, they found a hard, white rock.

One day, they found a hard, white rock. Salman tried to smash it with his pick-axe. His companions tried to smash it but they were unable, too. Whenever they hit the rock, it gave sparks. Therefore, the Muslims asked Salman's opinion. Salman went to tell the Prophet [s] about the rock and to allow them to change the direction of the trench. The Prophet [s] came to the trench and took the pick-axe from Salman. He came into…