That Al-Miqdad bin ʿAmr Al-Kindi, who was an ally of Bani Zuhra and one of those who fought the battle of Badr together with Messenger of Allah ﷺ told him that he said to Messenger of Allah ﷺ, "Suppose I met one of the infidels and we fought, and he struck one of my hands with his sword and cut it off and then took refuge in a tree and said, "I surrender to Allah (i.e. I have become a Muslim),' could I kill him, O Messenger of Allah ﷺ, after he had said this?" Messenger of Allah ﷺ said, "You should not kill him." Al- Miqdad said, "O Messenger of Allah ﷺ! But he had cut off one of my two hands, and then he had uttered those words?" Messenger of Allah ﷺ replied, "You should not kill him, for if you kill him, he would be in your position where you had been before killing him, and you would be in his position where he had been before uttering those words." (Using translation from Bukhārī 4019)
أَخْبَرَهُأَنَّ الْمِقْدَادَ بْنَ عَمْرٍو الْكِنْدِيَّ وَكَانَ حَلِيفًا لِبَنِي زُهْرَةَ وَكَانَ مِمَّنْ شَهِدَ بَدْرًا مَعَ رَسُولِ اللهِ ﷺ أَخْبَرَهُ أَنَّهُ قَالَ لِرَسُولِ اللهِ ﷺ أَرَأَيْتَ إِنْ لَقِيتُ رَجُلًا مِنَ الْكُفَّارِ فَاقْتَتَلْنَا فَضَرَبَ إِحْدَى يَدَيَّ بِالسَّيْفِ فَقَطَعَهَا ثُمَّ لَاذَ مِنِّي بِشَجَرَةٍ فَقَالَ أَسْلَمْتُ لِلَّهِ أَأَقْتُلُهُ يَا رَسُولَ اللهِ بَعْدَ أَنْ قَالَهَا؟ قَالَ رَسُولُ اللهِ ﷺ لَا تَقْتُلْهُ قَالَ يَا رَسُولَ اللهِ إِنَّهُ قَطَعَ إِحْدَى يَدَيَّ ثُمَّ قَالَ ذَلِكَ بَعْدَ مَا قَطَعَهَا قَالَ رَسُولُ اللهِ ﷺ لَا تَقْتُلْهُ فَإِنْ قَتَلْتَهُ فَإِنَّهُ بِمَنْزِلَتِكَ قَبْلَ أَنْ تَقْتُلَهُ وَإِنَّكَ بِمَنْزِلَتِهِ قَبْلَ أَنْ يَقُولَ كَلِمَتَهُ الَّتِي قَالَ