Ubaidah (al-salman) said: Ali mentioned about the people of al Nahrawan, saying: Among them there will be a man with a defective hand or with a small hand. if you were not to overjoy. I would inform you of what Allah has promised (the reward for) those who will kill them at the tongue of Muhammad ﷺ . I asked: Have you heard this from him? He replied: Yes, by the lord of the Kaabah.