Sunan an-Nasa'i 4072
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 [SAW].'"
أَخْبَرَنَا مُحَمَّدُ بْنُ الْعَلاَءِ، قَالَ حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، عَنْ عَمْرِو بْنِ مُرَّةَ، عَنْ سَالِمِ بْنِ أَبِي الْجَعْدِ، عَنْ أَبِي بَرْزَةَ، قَالَ تَغَيَّظَ أَبُو بَكْرٍ عَلَى رَجُلٍ فَقُلْتُ مَنْ هُوَ يَا خَلِيفَةَ رَسُولِ اللَّهِ قَالَ لِمَ قُلْتُ لأَضْرِبَ عُنُقَهُ إِنْ أَمَرْتَنِي بِذَلِكَ ‏.‏ قَالَ أَفَكُنْتَ فَاعِلاً قُلْتُ نَعَمْ ‏.‏ قَالَ فَوَاللَّهِ لأَذْهَبَ عِظَمُ كَلِمَتِي الَّتِي قُلْتُ غَضَبَهُ ثُمَّ قَالَ مَا كَانَ لأَحَدٍ بَعْدَ مُحَمَّدٍ صلى الله عليه وسلم ‏.‏