On the day of the Battle of Khaibar my brother fought a fierce fight by the side of the Messenger of Allah ﷺ. His sword rebounded and killed him. The Companions of the Messenger of Allah (may peace be upon hill) talked about his death and doubted (whether it was martyrdom). (They said): (He is) a man killed by his own weapon, and expressed doubt about his affair. Salama said: When the Messenger of Allah ﷺ returned from Khaibar, I said: Messenger of Allah, permit me that I may recite to you some rajaz verses. The Messenger of Allah ﷺ permitted him. 'Umar b. Khattab said: I know what you will recite. I recited: By God, if God had guided us not, We would hive neither been guided aright nor practised charity, Nor offered prayers. The Messenger of Allah ﷺ said: What you have said is true, 'I (continued): And descend on us peace and tranquillity And keep us steadfast if we encounter (with our enemies) And the polytheists have rebelled against us. When I finished my rajaz, the Messenger of Allah ﷺ said: Who composed these verses? I said: They were composed by my brother. The Messenger of Allah ﷺ said: May God show mercy to him! I said: By God, some people are reluctant to invoke God's mercy on him (because) they say he is a man who died by his own sword. (Hearing this) the Messenger of Allah ﷺ said: He died as God's devotee and warrior. Ibn Shihab has said: I asked one of the sons of Salama (b. Akwa') about (the death of 'Amir). He related to me a similar tradition except that he said: When I said some people were reluctant invoke God's blessings on him, the Messenger of Allah (may peace be, upon him said: They lied. ('Amir) died as God's devotee and warrior (in the cause of Allah). For him there is a double reward, and he pointed out this by putting his two fingers together. (Using translation from Muslim 1802b)
لَمَّا كَانَ يَوْمُ خَيْبَرَ قَاتَلَ أَخِي قِتَالًا شَدِيدًا مَعَ رَسُولِ اللهِ ﷺ فَارْتَدَّ عَلَيْهِ سَيْفُهُ فَقَتَلَهُ فَقَالَ أَصْحَابُ رَسُولِ اللهِ ﷺ فِي ذَلِكَ وَشَكُّوا فِيهِ رَجُلٌ مَاتَ بِسِلَاحِهِ قَالَ سَلَمَةُ فَقَفَلَ رَسُولُ اللهِ ﷺ مِنْ خَيْبَرَ فَقُلْتُ يَا رَسُولَ اللهِ أَتَأْذَنُ لِي أَنْ أَرْجُزَ بِكَ فَأَذِنَ لَهُ رَسُولُ اللهِ ﷺ فَقَالَ لَهُ عُمَرُ اعْلَمْ مَا تَقُولُ فَقُلْتُ [البحر الرجز] وَاللهِ لَوْلَا اللهُ مَا اهْتَدَيْنَا وَلَا تَصَدَّقْنَا وَلَا صَلَّيْنَا فَقَالَ رَسُولُ اللهِ ﷺ «صَدَقْتَ» فَأَنْزِلَنْ سَكِينَةً عَلَيْنَا وَثَبِّتِ الْأَقْدَامَ إِنْ لَاقَيْنَا وَالْمُشْرِكُونَ قَدْ بَغَوْا عَلَيْنَا فَلَمَّا قَضَيْتُ رَجَزِي قَالَ رَسُولُ اللهِ ﷺ «مَنْ قَالَ هَذَا؟» قُلْتُ أَخِي فَقَالَ رَسُولُ اللهِ ﷺ «يَرْحَمُهُ اللهُ» قُلْتُ يَا رَسُولَ اللهِ إِنَّ نَاسًا لَيَهَابُونَ الصَّلَاةَ عَلَيْهِ يَقُولُونَ رَجُلٌ مَاتَ بِسِلَاحِهِ فَقَالَ رَسُولُ اللهِ ﷺ «مَاتَ جَاهِدًا مُجَاهِدًا» قَالَ ابْنُ شِهَابٍ ثُمَّ سَأَلْتُ ابْنًا لِسَلَمَةَ بْنِ الْأَكْوَعِ فَحَدَّثَنِي عَنْ أَبِيهِ مِثْلَ ذَلِكَ غَيْرَ أَنَّهُ قَالَ حِينَ قُلْتُ إِنَّ نَاسًا يَهَابُونَ الصَّلَاةَ عَلَيْهِ قَالَ رَسُولُ اللهِ ﷺ «كَذَبُوا مَاتَ جَاهِدًا مُجَاهِدًا فَلَهُ أَجْرُهُ مَرَّتَيْنِ» وَأَشَارَ بِإِصْبُعَيْهِ قَالَ أَبُو عَبْدِ الرَّحْمَنِ وَهَذَا عِنْدَنَا خَطَأٌ وَالصَّوَابُ عَبْدُ الرَّحْمَنِ بْنُ عَبْدِ اللهِ بْنِ كَعْبٍ عَنْ سَلَمَةَ بْنِ الْأَكْوَعِ وَاللهُ أَعْلَمُ 10292 أَخْبَرَنَا أَحْمَدُ بْنُ يَحْيَى بْنِ الْوَزِيرِ بْنِ سُلَيْمَانَ حَدَّثَنَا ابْنُ عُفَيْرٍ عَنِ اللَّيْثِ عَنِ ابْنِ مُسَافِرٍ عَنِ ابْنِ شِهَابٍ عَنْ عَبْدِ الرَّحْمَنِ بْنِ كَعْبِ بْنِ مَالِكٍ الْأَنْصَارِيِّ أَنَّ سَلَمَةَ بْنَ الْأَكْوَعِ قَالَ لَمَّا كَانَ يَوْمُ خَيْبَرَ قَاتَلَ أَخِي قِتَالًا شَدِيدًا مَعَ رَسُولِ اللهِ ﷺ فَذَكَرَ نَحْوَهُ وَزَادَ فِيهِ قَالُوا اكْفُرُوا فَقُلْنَا أَبَيْنَا