Sunan an-Nasa'i 4091
سنن النسائي#4091Sahihأَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا عَبْدَةُ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ إِسْحَاقَ، عَنِ الزُّهْرِيِّ، عَنْ طَلْحَةَ بْنِ عَبْدِ اللَّهِ بْنِ عَوْفٍ، عَنْ سَعِيدِ بْنِ زَيْدٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَنْ قَاتَلَ دُونَ مَالِهِ فَهُوَ شَهِيدٌ " .
It was narrated from Sa'eed bin Zaid that:The Prophet [SAW] said: "Whoever is killed defending his wealth, he is a martyr
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:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 37:126