'Abdullah bin 'Umar narrated that The Messenger of Allah (ﷺ) said:
"He who is killed while defending his property is considered a martyr." Related by Abu Dawud An-Nasa'i and At-Tirmidhi who graded it as Sahih. (ID)
English reference (ID): Book 9, Hadith 1237 (ID)
Arabic reference (ID): Book 9, Hadith 1209 (ID)