It is narrated from Hazrat Sahl (may Allah be pleased with him) that I was with the Noble Prophet (peace and blessings be upon him) at the time of the Battle of the Trench. The Noble Prophet (peace and blessings be upon him) took a large pickaxe and began to dig the trench. Suddenly, a stone appeared in front of him, and the Noble Prophet (peace and blessings be upon him) began to laugh. Someone asked the reason for his laughter, so he replied: I am laughing at those people who will be brought from the east in chains and driven towards Paradise.