Sahih Muslim Book - 1, Hadith - 279

حَدَّثَنَا أَحْمَدُ بْنُ الْحَسَنِ بْنِ خِرَاشٍ حَدَّثَنَا عَمْرُو بْنُ عَاصِمٍ حَدَّثَنَا مُعْتَمِرٌ قَالَ سَمِعْتُ أَبِي يُحَدِّثُ أَنَّ خَالِدًا الْأَثْبَجَ ابْنَ أَخِي صَفْوَانَ بْنِ مُحْرِزٍ حَدَّثَ عَنْ صَفْوَانَ بْنِ مُحْرِزٍ أَنَّهُ حَدَّثَ أَنَّ جُنْدَبَ بْنَ عَبْدِ اللَّهِ الْبَجَلِيَّ بَعَثَ إِلَى عَسْعَسِ بْنِ سُلَامَةَ زَمَنَ فِتْنَةِ ابْنِ الزُّبَيْرِ فَقَالَ اجْمَعْ لِي نَفَرًا مِنْ إِخْوَانِكَ حَتَّى أُحَدِّثَهُمْ فَبَعَثَ رَسُولًا إِلَيْهِمْ فَلَمَّا اجْتَمَعُوا جَاءَ جُنْدَبٌ وَعَلَيْهِ بُرْنُسٌ أَصْفَرُ فَقَالَ تَحَدَّثُوا بِمَا كُنْتُمْ تَحَدَّثُونَ بِهِ حَتَّى دَارَ الْحَدِيثُ فَلَمَّا دَارَ الْحَدِيثُ إِلَيْهِ حَسَرَ الْبُرْنُسَ عَنْ رَأْسِهِ فَقَالَ إِنِّي أَتَيْتُكُمْ وَلَا أُرِيدُ أَنْ أُخْبِرَكُمْ عَنْ نَبِيِّكُمْ إِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بَعَثَ بَعْثًا مِنْ الْمُسْلِمِينَ إِلَى قَوْمٍ مِنْ الْمُشْرِكِينَ وَإِنَّهُمْ الْتَقَوْا فَكَانَ رَجُلٌ مِنْ الْمُشْرِكِينَ إِذَا شَاءَ أَنْ يَقْصِدَ إِلَى رَجُلٍ مِنْ الْمُسْلِمِينَ قَصَدَ لَهُ فَقَتَلَهُ وَإِنَّ رَجُلًا مِنْ الْمُسْلِمِينَ قَصَدَ غَفْلَتَهُ قَالَ وَكُنَّا نُحَدَّثُ أَنَّهُ أُسَامَةُ بْنُ زَيْدٍ فَلَمَّا رَفَعَ عَلَيْهِ السَّيْفَ قَالَ لَا إِلَهَ إِلَّا اللَّهُ فَقَتَلَهُ فَجَاءَ الْبَشِيرُ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَسَأَلَهُ فَأَخْبَرَهُ حَتَّى أَخْبَرَهُ خَبَرَ الرَّجُلِ كَيْفَ صَنَعَ فَدَعَاهُ فَسَأَلَهُ فَقَالَ لِمَ قَتَلْتَهُ قَالَ يَا رَسُولَ اللَّهِ أَوْجَعَ فِي الْمُسْلِمِينَ وَقَتَلَ فُلَانًا وَفُلَانًا وَسَمَّى لَهُ نَفَرًا وَإِنِّي حَمَلْتُ عَلَيْهِ فَلَمَّا رَأَى السَّيْفَ قَالَ لَا إِلَهَ إِلَّا اللَّهُ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَقَتَلْتَهُ؟ قَالَ نَعَمْ قَالَ فَكَيْفَ تَصْنَعُ بِلَا إِلَهَ إِلَّا اللَّهُ إِذَا جَاءَتْ يَوْمَ الْقِيَامَةِ قَالَ يَا رَسُولَ اللَّهِ اسْتَغْفِرْ لِي قَالَ وَكَيْفَ تَصْنَعُ بِلَا إِلَهَ إِلَّا اللَّهُ إِذَا جَاءَتْ يَوْمَ الْقِيَامَةِ قَالَ فَجَعَلَ لَا يَزِيدُهُ عَلَى أَنْ يَقُولَ كَيْفَ تَصْنَعُ بِلَا إِلَهَ إِلَّا اللَّهُ إِذَا جَاءَتْ يَوْمَ الْقِيَامَةِ.

It was narrated from Safwan bin Muhriz that Jundab bin 'Abdullah Al-Bajali sent word to 'As'as bin Sulamah at the time of the Fitnah of Ibn Az-Zubair, saying: "Gather together a number of your brothers for me so that I may talk to them." He sent a messenger to them (his brothers), and when they had gathered, Jundab came, wearing a yellow Burnus, and said: "Tell me what you were talking about." They spoke, and when it was his tum he lowered the hood of the Burnus from his head and said: "I have come to you, and I shall narrate to you from your Prophet (s.a.w). The Messenger of Allah (s.a.w) sent a party of Muslims to some of the idolators and they met in battle. There was one man among the idolators who, whenever he decided to attack a man among the Muslims, would attack him and kill him. There was a man among the Muslims who was waiting for him to drop his guard, and we used to say among ourselves that he was Usamah bin Zaid. When he raised his sword, (that idolator) said La ilaha illallah, but he killed him. The harbinger of glad tidings went to the Prophet (s.a.w), who asked him (about the battle) and he told him, including the story of what had happened to that man. The Prophet (s.a.w) called him and asked him: 'Why did you kill him?' He said: 'O Messenger of Allah, he had caused a great deal of harm to the Muslims, and he killed so-and-so and so-and-so' - naming a number of men - 'and when he saw the sword he said La ilaha illallah.' The Messenger of Allah (s.a.w) said: 'Did you kill him?' He said: 'Yes.' He said: 'What will you do with La ilaha illallah when it comes on the Day of Resurrection?' He said: 'O Messenger of Allah, pray for forgiveness for me.' He said: 'What will you do with La ilaha illallah when it comes on the Day of Resurrection?' And he said no more than 'What will you do with La ilaha illallah when it comes on the Day of Resurrection?'"