It is narrated from Ubaidah, he says: When Sayyiduna Ali (may Allah be pleased with him) killed the people of Nahrawan, he said: Search for the slain man of this description. The people found him fallen in a pit beneath the slain. They took him out, and Sayyiduna Ali (may Allah be pleased with him) turned to his companions and said: If I did not fear that you would fall into pride and arrogance, I would tell you what Allah Almighty has promised, through the words of Muhammad (peace and blessings be upon him), for the killers of these people. I said: O Ali! Did you yourself hear this from the Messenger of Allah (peace and blessings be upon him)? He said: Yes, by the Lord of the Ka'bah.