The Prophet ﷺ said, "Whoever is killed unjustly defending his property is a martyr."
حدثنا عفان حدثنا وهيب عن أيوب عن أبي قلابة
عن النبي ﷺ قال من قتل دون ماله مظلوما فهو شهيد
Its isnad is sahih, and it has already appeared several times through different routes, including 6522 and 7031, and we noted that at the beginning of it.