Sayyiduna Ammar bin Yasir (may Allah be pleased with him) says: I and Sayyiduna Ali (may Allah be pleased with him) were companions in the expedition of Dhat al-‘Usheirah. Then he narrated an incident, in which it was also mentioned that both of them slept on the ground, and on that day the Messenger of Allah (peace and blessings be upon him) called Sayyiduna Ali (may Allah be pleased with him) by the nickname“Abu Turab,”because dust was visible on his body. Then the Prophet (peace and blessings be upon him) said:“Shall I not inform you of the two most wretched men?”We said:“O Messenger of Allah! Of course.”The Prophet (peace and blessings be upon him) said:“The red one of Thamud, who hamstrung the she-camel, and the man who (O Ali!) will strike your head until your (beard) is soaked with blood.”