Sunan Abi Dawud 2500
سنن أبي داود#2500Sahihحَدَّثَنَا سَعِيدُ بْنُ مَنْصُورٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، حَدَّثَنِي أَبُو هَانِئٍ، عَنْ عَمْرِو بْنِ مَالِكٍ، عَنْ فَضَالَةَ بْنِ عُبَيْدٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ : " كُلُّ الْمَيِّتِ يُخْتَمُ عَلَى عَمَلِهِ، إِلاَّ الْمُرَابِطَ فَإِنَّهُ يَنْمُو لَهُ عَمَلُهُ إِلَى يَوْمِ الْقِيَامَةِ وَيُؤَمَّنُ مِنْ فَتَّانِ الْقَبْرِ " .
Narrated Fadalah ibn Ubayd: The Prophet (ﷺ) said: Everyone who dies will have fully complete his action, except one who is on the frontier (in Allah's path), for his deeds will be made to go on increasing till the Day of Resurrection, and he will be safe from the trial in the grave
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 15:24