حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، عَنِ اللَّيْثِ، عَنِ ابْنِ شِهَابٍ، عَنْ عَطَاءِ بْنِ يَزِيدَ اللَّيْثِيِّ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَدِيِّ بْنِ الْخِيَارِ، عَنِ الْمِقْدَادِ بْنِ الأَسْوَدِ، أَنَّهُ أَخْبَرَهُ أَنَّهُ، قَالَ يَا رَسُولَ اللَّهِ أَرَأَيْتَ إِنْ لَقِيتُ رَجُلاً مِنَ الْكُفَّارِ فَقَاتَلَنِي فَضَرَبَ إِحْدَى يَدَىَّ بِالسَّيْفِ ثُمَّ لاَذَ مِنِّي بِشَجَرَةٍ فَقَالَ أَسْلَمْتُ لِلَّهِ ‏.‏ أَفَأَقْتُلُهُ يَا رَسُولَ اللَّهِ بَعْدَ أَنْ قَالَهَا قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ لاَ تَقْتُلْهُ ‏"‏ ‏.‏ فَقُلْتُ يَا رَسُولَ اللَّهِ إِنَّهُ قَطَعَ يَدِي ‏.‏ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏لاَ تَقْتُلْهُ فَإِنْ قَتَلْتَهُ فَإِنَّهُ بِمَنْزِلَتِكَ قَبْلَ أَنْ تَقْتُلَهُ وَأَنْتَ بِمَنْزِلَتِهِ قَبْلَ أَنْ يَقُولَ كَلِمَتَهُ الَّتِي قَالَ ‏"
Translation

Al-Miqdad ibn al-Aswad reported that he informed him: He said, "O Messenger of Allah! What do you think if I meet a man from among the disbelievers and he fights me, and strikes one of my hands with the sword, then takes refuge from me behind a tree and says, 'I have submitted to Allah'? Should I kill him, O Messenger of Allah, after he has said it?" The Messenger of Allah (ﷺ) said, "Do not kill him." I said, "O Messenger of Allah, he cut off my hand!" The Messenger of Allah (ﷺ) said, "Do not kill him, for if you kill him, indeed he is in your position before you killed him, and you are in his position before he said the statement that he said."