It was narrated from Abu Nadrah, that Abu Barzah said:
"Abu Bakr got very angry with a man, so much so that his color changed. I said: 'O Khalifah of the Messenger of Allah, if you tell me to, I will strike his neck (kill him).' It was as if cold water had been poured on him and he became calm. He said: 'May your mother be bereft of you, Abu Barzah! That is not for anyone after the Messenger of Allah [SAW].'"