"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 [SAW].'" (Using translation from Nasāʾī 4076)
أَتَيْتُ عَلَى أَبِي بَكْرٍ وَقَدْ أَغْلَظَ لِرَجُلٍ فَرَدَّ عَلَيْهِ فَقُلْتُ أَلَا أَضْرِبُ عُنُقَهُ فَانْتَهَرَنِي وَقَالَ إِنَّهَا لَيْسَتْ لِأَحَدٍ بَعْدَ رَسُولِ اللهِ ﷺ قَالَ أَبُو عَبْدِ الرَّحْمَنِ أَبُو نَصْرٍ هُوَ حَميَدُ بْنُ هِلَالٍ وَرَوَاهُ عَنْهُ يُونُسُ بْنُ عُبَيْدٍ فَأَسْنَدَهُ