Sahih Muslim
Sahih Muslim 96b
حَدَّثَنَا يَعْقُوبُ الدَّوْرَقِيُّ، حَدَّثَنَا هُشَيْمٌ، أَخْبَرَنَا حُصَيْنٌ، حَدَّثَنَا أَبُو ظِبْيَانَ، قَالَ سَمِعْتُ أُسَامَةَ بْنَ زَيْدِ بْنِ حَارِثَةَ، يُحَدِّثُ قَالَ بَعَثَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم إِلَى الْحُرَقَةِ مِنْ جُهَيْنَةَ فَصَبَّحْنَا الْقَوْمَ فَهَزَمْنَاهُمْ وَلَحِقْتُ أَنَا وَرَجُلٌ مِنَ الأَنْصَارِ رَجُلاً مِنْهُمْ فَلَمَّا غَشَيْنَاهُ قَالَ لاَ إِلَهَ إِلاَّ اللَّهُ . فَكَفَّ عَنْهُ الأَنْصَارِيُّ وَطَعَنْتُهُ بِرُمْحِي حَتَّى قَتَلْتُهُ . قَالَ فَلَمَّا قَدِمْنَا بَلَغَ ذَلِكَ النَّبِيَّ صلى الله عليه وسلم فَقَالَ لِي " يَا أُسَامَةُ أَقَتَلْتَهُ بَعْدَ مَا قَالَ لاَ إِلَهَ إِلاَّ اللَّهُ " . قَالَ قُلْتُ يَا رَسُولَ اللَّهِ إِنَّمَا كَانَ مُتَعَوِّذًا . قَالَ فَقَالَ " أَقَتَلْتَهُ بَعْدَ مَا قَالَ لاَ إِلَهَ إِلاَّ اللَّهُ " . قَالَ فَمَازَالَ يُكَرِّرُهَا عَلَىَّ حَتَّى تَمَنَّيْتُ أَنِّي لَمْ أَكُنْ أَسْلَمْتُ قَبْلَ ذَلِكَ الْيَوْمِ .
Ya'qub al-Dawraqi narrated to us; Hushaym narrated to us; Husayn informed us; Abu Zibyan narrated to us. He said: I heard Usamah ibn Zayd ibn Harithah relate: The Messenger of Allah (peace and blessings be upon him) sent us to al-Huraqah of Juhaynah. At dawn we attacked them and routed them. An Ansari man and I caught up with one of them. When we had cornered him, he said: ‘There is no god but Allah.’ The Ansari held back, but I stabbed him with my spear until I killed him. When we returned, this news reached the Prophet (peace and blessings be upon him), and he said to me: ‘Usamah, did you kill him after he said, “There is no god but Allah”?’ I replied: ‘Messenger of Allah, he only said it to protect himself.’ He said: ‘Did you kill him after he said, “There is no god but Allah”?’ He kept repeating it to me until I wished I had not embraced Islam before that day.