It was narrated that Abu Hurairah said:
"The Messenger of Allah (ﷺ) said: 'If a man's property is wrongfully targeted, and he is killed, he is a martyr." (TR)
English reference (TR): Vol. 3, Book 20, Hadith 2582 (TR)
Arabic reference (TR): Book 20, Hadith 2680 (TR)