It is narrated from Tariq bin Ziyad, he says: We set out in the company of Sayyiduna Ali (may Allah be pleased with him) to confront the Khawarij. Sayyiduna Ali (may Allah be pleased with him) killed them and then said: Look, the Noble Prophet (peace and blessings be upon him) had said that soon a people will emerge who will speak words of truth, but it will not go beyond their throats. They will exit from the truth just as an arrow passes through its prey. Their sign is that among them there will be a man who is dark-skinned and has a defective hand, and on his hand there will be black hair. Now see, if any of the slain is such a person, then you have killed the worst of people, and if none of the slain is such, then you have killed the best of people. Then we actually found a slain man with a defective hand like that, so we all fell in prostration before Allah Almighty, and Ali (may Allah be pleased with him) also fell in prostration with us.