"I came to Abu Bakr when he had spoken harshly to a man who had answered back. I said: 'Shall I not strike his neck (kill him)?' He rebuked me, and said: 'That is not for anyone after the Messenger of Allah .'"
Sunan an-Nasa'i Book 37, Hadith 111
← Previous Hadith "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 .'"

Sunan an-Nasa'i Book 37, Hadith 110 Next Hadith → "We were with Abu Bakr As-Siddiq, and he got angry with a man from among the Muslims, and became very angry indeed. When I saw that, I said: 'O Khalifah of the Messenger of Allah, shall I strike his neck?' When I mentioned killing him, he stopped being angry with him and changed the subject. When we parted, he sent for me and said: 'O Abu Barzah, what did you say?' I said: 'I have forgotten what I said; remind me.' He said: 'Do you not remember what you said?' I said: 'No, by Allah.' He said: 'Don't you remember, when you saw me angry with a man, and said, 'I will strike his neck O Khalifah of the Messenger of Allah?' Don't you remember that? Would you really have done that?' I said: 'Yes, by Allah, and if you tell me to do it now, I will do it.' He said: 'By Allah, that is not for anyone after Muhammad .'"

Sunan an-Nasa'i Book 37, Hadith 112