عَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ آمَنَ بِاللَّهِ وَرَسُولِهِ وَأَقَامَ الصَّلَاةَ وَصَامَ رَمَضَانَ كَانَ حَقًّا عَلَى اللَّهِ أَنْ يُدْخِلَهُ الْجَنَّةَ جَاهَدَ فِي سهل اللَّهِ أَوْ جَلَسَ فِي أَرْضِهِ الَّتِي وُلِدَ فِيهَا» . قَالُوا: أفَلا نُبشِّرُ النَّاسَ؟ قَالَ: «إِنَّ فِي الْجَنَّةِ مِائَةَ دَرَجَةٍ أَعَدَّهَا اللَّهُ لِلْمُجَاهِدِينَ فِي سَبِيلِ اللَّهِ مَا بَيْنَ الدَّرَجَتَيْنِ كَمَا بَيْنَ السَّمَاءِ وَالْأَرْضِ فَإِذَا سَأَلْتُمُ اللَّهَ فَاسْأَلُوهُ الْفِرْدَوْسَ فَإِنَّهُ أَوْسَطُ الْجَنَّةِ وَأَعْلَى الْجَنَّةِ وَفَوْقَهُ عَرْشُ الرَّحْمَنِ وَمِنْهُ تُفَجَّرُ أنهارُ الجنَّةِ» . رَوَاهُ البُخَارِيّ

Abu Huraira reported God's Messenger as saying, "God most high will cheerfully welcome two men one of whom kills the other. They will enter paradise, one having fought in God’s path and been killed, and the slayer, after receiving God's pardon, having died as a martyr."* * The man who had fought and killed a Muslim later became a Muslim himself and was killed in the course of jihad.(Bukhari and Muslim.)