'Alqamah bin Wa'il narrated from his father that he was sitting with the Messenger of Allah when a man came leading another man by a string. He said:

"O Messenger of Allah, this man killed my brother." The Messenger of Allah said to him: "Did you kill him?" He said: "O Messenger of Allah even if he did not confess I would have brought proof against him." He said: "Yes, I killed him." He said: "How did you kill him?" He said: "He and I were chopping firewood from a tree and he insulted me, so I got angry and struck him with the ax on the forehead." The Messenger of Allah said: "Do you have any wealth with which you can pay the Diyah to save yourself?" He said: "O Messenger of Allah, I do not have anything but my ax and my clothes." The Messenger of Allah said to him: "Do you think your people will pay to save you?" He said: "I am too insignificant to them for that." He threw the string to the man and said: "Here, thank him." When he turned to go, the Messenger of Allah said: "If he kills him, he will be like him. "They caught up with the man, and said: "Woe to you! The Messenger of Allah said: 'If he kills him, he will be like him. "So he went back to the Messenger of Allah and said: "O Messenger of Allah, I have been told that you said: 'if he kills him, he will be like him. 'But I only took him because you told me to. He said: 'Don't you want him to carry your sin and the sin of your companion (the victim)?' He said: 'Yes, if that is the case.' He said: 'And that is how it is."'

أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالَ حَدَّثَنَا خَالِدٌ، قَالَ حَدَّثَنَا حَاتِمٌ، عَنْ سِمَاكٍ، ذَكَرَ أَنَّ عَلْقَمَةَ بْنَ وَائِلٍ، أَخْبَرَهُ عَنْ أَبِيهِ، أَنَّهُ كَانَ قَاعِدًا عِنْدَ رَسُولِ اللَّهِ ﷺ إِذْ جَاءَ رَجُلٌ يَقُودُ آخَرَ بِنِسْعَةٍ فَقَالَ يَا رَسُولَ اللَّهِ قَتَلَ هَذَا أَخِي . فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ " أَقَتَلْتَهُ " . قَالَ يَا رَسُولَ اللَّهِ لَوْ لَمْ يَعْتَرِفْ أَقَمْتُ عَلَيْهِ الْبَيِّنَةَ . قَالَ نَعَمْ قَتَلْتُهُ . قَالَ " كَيْفَ قَتَلْتَهُ " . قَالَ كُنْتُ أَنَا وَهُوَ نَحْتَطِبُ مِنْ شَجَرَةٍ فَسَبَّنِي فَأَغْضَبَنِي فَضَرَبْتُ بِالْفَأْسِ عَلَى قَرْنِهِ . فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ " هَلْ لَكَ مِنْ مَالٍ تُؤَدِّيهِ عَنْ نَفْسِكَ " . قَالَ يَا رَسُولَ اللَّهِ مَالِي إِلاَّ فَأْسِي وَكِسَائِي . فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ " أَتُرَى قَوْمَكَ يَشْتَرُونَكَ " . قَالَ أَنَا أَهْوَنُ عَلَى قَوْمِي مِنْ ذَاكَ . فَرَمَى بِالنِّسْعَةِ إِلَى الرَّجُلِ فَقَالَ " دُونَكَ صَاحِبَكَ " . فَلَمَّا وَلَّى قَالَ رَسُولُ اللَّهِ ﷺ " إِنْ قَتَلَهُ فَهُوَ مِثْلُهُ " . فَأَدْرَكُوا الرَّجُلَ فَقَالُوا وَيْلَكَ إِنَّ رَسُولَ اللَّهِ ﷺ قَالَ " إِنْ قَتَلَهُ فَهُوَ مِثْلُهُ " . فَرَجَعَ إِلَى رَسُولِ اللَّهِ ﷺ فَقَالَ يَا رَسُولَ اللَّهِ حُدِّثْتُ أَنَّكَ قُلْتَ " إِنْ قَتَلَهُ فَهُوَ مِثْلُهُ " . وَهَلْ أَخَذْتُهُ إِلاَّ بِأَمْرِكَ فَقَالَ " مَا تُرِيدُ أَنْ يَبُوءَ بِإِثْمِكَ وَإِثْمِ صَاحِبِكَ " . قَالَ بَلَى . قَالَ " فَإِنْ ذَاكَ " . قَالَ ذَلِكَ كَذَلِكَ .