That the Messenger of Allah ﷺ said: "Dying in the cause of Allah expiates every sin." Jibril said: "Except for debt." So the Messenger of Allah ﷺ said: "Except the debt."  

قَالَ رَسُولُ اللَّهِ ﷺ الْقَتْلُ فِي سَبِيلِ اللَّهِ يُكَفِّرُ كُلَّ خَطِيئَةٍ فَقَالَ جِبْرِيلُ إِلاَّ الدَّيْنَ فَقَالَ النَّبِيُّ ﷺ إِلاَّ الدَّيْنَ  

From his father that the Messenger of Allah ﷺ said: "The souls of the martyrs are in green birds, suspended from the fruit of Paradise, or the trees of Paradise."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِنَّ أَرْوَاحَ الشُّهَدَاءِ فِي طَيْرٍ خُضْرٍ تَعْلُقُ مِنْ ثَمَرَةِ الْجَنَّةِ أَوْ شَجَرِ الْجَنَّةِ  

That the Messenger of Allah ﷺ said, "I was shown the first of (every) three to enter Paradise: A martyr, an 'Atif, who is a Muta'affif, and a slave who perfected his worship of Allah, and was sincere to his masters."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ عُرِضَ عَلَىَّ أَوَّلُ ثَلاَثَةٍ يَدْخُلُونَ الْجَنَّةَ شَهِيدٌ وَعَفِيفٌ مُتَعَفِّفٌ وَعَبْدٌ أَحْسَنَ عِبَادَةَ اللَّهِ وَنَصَحَ لِمَوَالِيهِ  

That the Prophet ﷺ, "There is no person who dies having good (prepared for him) with Allah, who wishes to return to the world, and to have the world and all it contains, except for the martyr because of what he knows about the virtue of martyrdom. For, indeed he loves to return to the world so that he may be killed another time."  

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ مَا مِنْ عَبْدٍ يَمُوتُ لَهُ عِنْدَ اللَّهِ خَيْرٌ يُحِبُّ أَنْ يَرْجِعَ إِلَى الدُّنْيَا وَأَنَّ لَهُ الدُّنْيَا وَمَا فِيهَا إِلاَّ الشَّهِيدُ لِمَا يَرَى مِنْ فَضْلِ الشَّهَادَةِ فَإِنَّهُ يُحِبُّ أَنْ يَرْجِعَ إِلَى الدُّنْيَا فَيُقْتَلَ مَرَّةً أُخْرَى