Hadith 6938
Ubaidah Sulmani narrates: Sayyiduna Ali (may Allah be pleased with him) mentioned the Khawarij and said: Among them will be a man whose one hand will be small (the narrator is in doubt, perhaps these are the words) one hand will be incomplete. If you do not boast, I will tell you what Allah Almighty has promised, through the tongue of His Prophet, to those who fight against these people. The narrator says: I asked Sayyiduna Ali (may Allah be pleased with him): Did you yourself hear this from the Prophet (peace and blessings of Allah be upon him)? He replied: Yes, by the Lord of the Ka'bah, yes, by the Lord of the Ka'bah, yes, by the Lord of the Ka'bah.