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." (JA)
English reference (JA): Vol. 3, Book 20, Hadith 2582 (JA)
Arabic reference (JA): Book 20, Hadith 2680 (JA)