Bless sins for the fifth time Ibn Ishaq does not say that Al Rabi killed Mahmud In fact it is Marhab who is said to have killed him by throwing a millstone upon him during the siege of Na i m and ibn Ishaq shows Muhammad b Maslama accepting Marhab s challenge to single combat in order to avenge his brother I don t know what to make of the fact that you keep tying to add this falsehood