It was narrated from Sa'eed bin Zaid that:

The Prophet ﷺ said: "Whoever is killed defending his wealth, he is a martyr." This is an abridgement of it.

أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، وَقُتَيْبَةُ، - وَاللَّفْظُ لإِسْحَاقَ - قَالاَ أَنْبَأَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ طَلْحَةَ بْنِ عَبْدِ اللَّهِ بْنِ عَوْفٍ، عَنْ سَعِيدِ بْنِ زَيْدٍ، عَنِ النَّبِيِّ ﷺ قَالَ " مَنْ قُتِلَ دُونَ مَالِهِ فَهُوَ شَهِيدٌ " .