Musannaf Ibn Abi Shaybah 40689 — Reports on the Khawarij

The Kharijites were once mentioned before Sayyiduna Ali (may Allah be pleased with him), and he said: "Among them is a man whose hand is incomplete. Were I not concerned that you would become exultant, I would certainly tell you what Allah Almighty has promised, on the tongue of His Prophet (peace and blessings be upon him), to those who fight the Kharijites." The narrator said: I said: "Did you yourself hear this from the Messenger of Allah (peace and blessings be upon him)?" Sayyiduna Ali (may Allah be pleased with him) said: "By the Lord of the Ka'bah, I did hear it." He said this three times.