Sahih Muslim Book - 33, Hadith - 4916

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى التَّمِيمِيُّ وَقُتَيْبَةُ بْنُ سَعِيدٍ وَاللَّفْظُ لِيَحْيَى قَالَ قُتَيْبَةُ حَدَّثَنَا و قَالَ يَحْيَى أَخْبَرَنَا جَعْفَرُ بْنُ سُلَيْمَانَ عَنْ أَبِي عِمْرَانَ الْجَوْنِيِّ عَنْ أَبِي بَكْرِ بْنِ عَبْدِ اللَّهِ بْنِ قَيْسٍ عَنْ أَبِيهِ قَالَ سَمِعْتُ أَبِي وَهُوَ بِحَضْرَةِ الْعَدُوِّ يَقُولُا قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّ أَبْوَابَ الْجَنَّةِ تَحْتَ ظِلَالِ السُّيُوفِ فَقَامَ رَجُلٌ رَثُّ الْهَيْئَةِ فَقَالَ يَا أَبَا مُوسَى آنْتَ سَمِعْتَ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ هَذَا قَالَ نَعَمْ قَالَ فَرَجَعَ إِلَى أَصْحَابِهِ فَقَالَ أَقْرَأُ عَلَيْكُمْ السَّلَامَ ثُمَّ كَسَرَ جَفْنَ سَيْفِهِ فَأَلْقَاهُ ثُمَّ مَشَى بِسَيْفِهِ إِلَى الْعَدُوِّ فَضَرَبَ بِهِ حَتَّى قُتِلَ.

It was narrated from Abu Bakr bin 'Abdullah bin Qais, from his father: "The Messenger of Allah (s.a.w) said: 'The gates of Paradise are beneath the shadows of the swords.' An unkempt man stood up and said: 'O Abu Musa, did you hear the Messenger of Allah (s.a.w) say this?' He said: 'Yes.' He went back to his Companions and said: 'I greet you with peace.' Then he broke the scabbard of his sword and threw it aside, then he walked towards the enemy with his sword and fought with it until he was killed.''