It was narrated from Sa'eed bin Zaid bin 'Amr bin Nufail that the Prophet ﷺ said:
“Whoever is killed defending his property, he is a martyr.”

حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ طَلْحَةَ بْنِ عَبْدِ اللَّهِ بْنِ عَوْفٍ، عَنْ سَعِيدِ بْنِ زَيْدِ بْنِ عَمْرِو بْنِ نُفَيْلٍ، عَنِ النَّبِيِّ ﷺ قَالَ " مَنْ قُتِلَ دُونَ مَالِهِ فَهُوَ شَهِيدٌ " .