Sunan Ibn Majah, Volume 5, Book 36, Hadith 3929 (DarusSalam) ⓘ

‘Amr bin Aws narrated that his father, Aws, told him: “We were sitting with the Prophet and he was narrating to us and reminding us, when a man came and spoke privately to him. He said: ‘Take him away and kill him.’ When the man turned away, the Messenger of Allah called him back and said: ‘Do you bear witness that none has the right to be worshiped but Allah?’ He said, ‘Yes.’ He said: ‘Then go and let him go, for I have been commanded to fight the people until they say: La ilaha illallah, then if they do that, their blood and wealth are forbidden to me.’”

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ بَكْرٍ السَّهْمِيُّ، حَدَّثَنَا حَاتِمُ بْنُ أَبِي صَغِيرَةَ، عَنِ النُّعْمَانِ بْنِ سَالِمٍ، أَنَّ عَمْرَو بْنَ أَوْسٍ، أَخْبَرَهُ أَنَّ أَبَاهُ أَوْسًا أَخْبَرَهُ قَالَ إِنَّا لَقُعُودٌ عِنْدَ النَّبِيِّ ـ صلى الله عليه وسلم ـ وَهُوَ يَقُصُّ عَلَيْنَا وَيُذَكِّرُنَا إِذْ أَتَاهُ رَجُلٌ فَسَارَّهُ فَقَالَ النَّبِيُّ ـ صلى الله عليه وسلم ـ ‏"‏ اذْهَبُوا بِهِ فَاقْتُلُوهُ ‏"‏ ‏.‏ فَلَمَّا وَلَّى الرَّجُلُ دَعَاهُ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ فَقَالَ ‏"‏ هَلْ تَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ ‏"‏ ‏.‏ قَالَ نَعَمْ قَالَ ‏"‏ اذْهَبُوا فَخَلُّوا سَبِيلَهُ فَإِنَّمَا أُمِرْتُ أَنْ أُقَاتِلَ النَّاسَ حَتَّى يَقُولُوا لاَ إِلَهَ إِلاَّ اللَّهُ فَإِذَا فَعَلُوا ذَلِكَ حَرُمَ عَلَىَّ دِمَاؤُهُمْ وَأَمْوَالُهُمْ ‏"‏ ‏.‏