"Jundab said: 'So and so told me that the Messenger of Allah [SAW] said: The slain will bring his killer on the Day of Resurrection and will say: Ask him why he killed me. He will say: I killed him defending the kingdom of so and so.'" Jundab said: "So be careful.'" (Using translation from Nasāʾī 3998)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ يَجِيءُ الْمَقْتُولُ بِقَاتِلِهِ يَوْمَ الْقِيَامَةِ فَيَقُولُ يَا رَبِّ سَلْ هَذَا فِيمَ قَتَلَنِي قَالَ شُعْبَةُ فَأَحْسِبُهُ قَالَ فَيَقُولُ عَلَامَ قَتَلْتَهُ؟ فَيَقُولُ قَتَلْتُهُ عَلَى مُلْكِ فُلَانٍ قَالَ فَقَالَ جُنْدُبٌ فَاتَّقِهَا