Narrated Al-Ahnaf bin Qais: I went to help that man (i.e., `Ali), and on the way I met Abu Bakra who asked me, Where are you going? I replied, I am going to help that man. He said, Go back, for I heard Allah's Apostle saying, 'If two Muslims meet each other with their swords then (both) the killer and the killed one are in the (Hell) Fire.' I said, 'O Allah's Apostle! It is alright for the killer, but what about the killed one?' He said, 'The killed one was eager to kill his opponent.