It was narrated that Abu Barzah said: "I passed by Abu Bakr and he was furious with one of his companions. I said: O Khalifah of the Messenger of Allah, who is the one with whom you are furious? He said: Why are you asking about him? I said: I will strike his neck (kill him). By Allah, the seriousness of what I said took away his anger. Then he said: That is not for anyone after Muhammad (صلی اللہ علیہ وسلم).