It is narrated from Hazrat Jabir bin Abdullah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) and his companions dug the trench for three days in such a state that they had not even tasted food. Then the companions submitted, "O Messenger of Allah (peace and blessings be upon him)! A very hard part of the mountain has come up." The Messenger of Allah (peace and blessings be upon him) said, "Sprinkle water on it." So the companions sprinkled water on that part, then the Noble Prophet (peace and blessings be upon him) came, took a pickaxe or a spade in his hand and said, "In the name of Allah." Then he (peace and blessings be upon him) struck it three times, and that part turned into a heap of sand. Hazrat Jabir says: "Then I happened to glance at the Messenger of Allah (peace and blessings be upon him) and saw that he had tied a stone to his blessed stomach."