Salamah bin Al Akwa’ said “On the day of the battle of the Khaibar, my brother fought desperately. But his sword fell back on him and killed him. The Companions of the Apostle of Allaah ﷺ talked about him and doubted it (his martyrdom) saying “A man who died with his own weapon”. The Apostle of Allaah ﷺ said “he died as a warrior striving in the path of Allaah. Ibn Shihab said “I asked the son of Salamah bin Al Akwa’.” He narrated to me on the authority of his father similar to that except that he said “The Apostle of Allaah ﷺ said “They told a lie, he died as a warrior striving in the path of Allaah. There is a double reward for him.”” (Using translation from Abū Dāʾūd 2538)   

لَمَّا كَانَ يَوْمُ خَيْبَرَ قَاتَلَ أَخِي قِتَالًا شَدِيدًا فَارْتَدَّ عَلَيْهِ سَيْفُهُ فَقَتَلَهُ فَقَالَ أَصْحَابُ رَسُولِ اللهِ ﷺ فِي ذَلِكَ وَشَكُّوا فِيهِ رَجُلٌ مَاتَ بِسِلَاحِهِ فَقَالَ رَسُولُ اللهِ ﷺ مَاتَ جَاهِدًا مُجَاهِدًا قَالَ ابْنُ شِهَابٍ ثُمَّ سَأَلْتُ ابْنًا لِسَلَمَةَ بْنِ الْأَكْوَعِ فَحَدَّثَنِي عَنْ أَبِيهِ بِمِثْلِ ذَلِكَ غَيْرَ أَنَّهُ قَالَ فَقَالَ رَسُولُ اللهِ ﷺ كَذَبُوا مَاتَ جَاهِدًا مُجَاهِدًا فَلَهُ أَجْرُهُ مَرَّتَيْنِ  

AbuSalam reported on the authority of a man from the companion of the Prophet ﷺ. He said: We attacked a tribe of Juhaynah. A man from the Muslims pursued a man of them, and struck him but missed him. He struck himself with the sword. The Messenger of Allah ﷺ said: Your brother, O group of Muslims. The people hastened towards him, but found him dead. The Messenger of Allah ﷺ wrapped him with his clothes and his blood, and offered (funeral) prayer for him and buried him. They said: Messenger of Allah, is he a martyr? He said: Yes, and I am witness to him. (Using translation from Abū Dāʾūd 2539)   

عَنْ رَجُلٍ مِنْ أَصْحَابِ النَّبِيِّ ﷺ قَالَ أَغَرْنَا عَلَى حَيٍّ مِنْ جُهَيْنَةَ فَطَلَبَ رَجُلٌ مِنَ الْمُسْلِمِينَ رَجُلًا مِنْهُمْ فَضَرَبَهُ فَأَخْطَأَهُ وَأَصَابَ نَفْسَهُ بِالسَّيْفِ فَقَالَ رَسُولُ اللهِ ﷺ أَخُوكُمْ يَا مَعْشَرَ الْمُسْلِمِينَ فَابْتَدَرَهُ النَّاسُ فَوَجَدُوهُ قَدْ مَاتَ فَلَفَّهُ رَسُولُ اللهِ ﷺ بِثِيَابِهِ وَدِمَائِهِ وَصَلَّى عَلَيْهِ وَدَفَنَهُ فَقَالُوا يَا رَسُولَ اللهِ أَشَهِيدٌ هُوَ؟ قَالَ نَعَمْ وَأَنَا لَهُ شَهِيدٌ