It was narrated that ‘Abeedah said: ‘Ali (رضي الله عنه) mentioned the people of an-Nahrawan. He said: Among them is a man with a defective arm, or an incomplete arm, or a small arm. If you could exercise restraint, I would have told you what Allah promised on the lips of Muhammad to those who kill them. I said: Did you hear that from him? He said: Yes, by the Lord of the Ka`bah.