It was narrated that Abu Barzah said: "Abu Bakr got infuriated with a man, and I said: Who is he, O Khalifah of the Messenger of Allah? He said: Why? I said: So that I might strike his neck (killing him) if you tell me to. He said: Would you really do that? I said: Yes. 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).