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