Are you not aware that the Messenger of Allah (ﷺ) had observed:" He who died in protecting his property is a martyr."
Sahih Muslim Book 1, Hadith 268
← Previous Hadith A person came to the Messenger of Allah (ﷺ) and said: Messenger of Allah, what do you think if a man comes to me in order to appropriate my possession? He (the Holy Prophet) said: Don't surrender your possession to him. He (the inquirer) said: If he fights me? He (the Holy Prophet) remarked: Then fight (with him). He (the inquirer) again said: What do you think if I am killed? He (the Holy Prophet) observed: You would be a martyr. He (the inquirer) said: What do you think of him (Messenger of Allah) If I kill him. He (the Holy Prophet) said: he would be in the Fire.

Sahih Muslim Book 1, Hadith 267 Next Hadith → This hadith has been narrated by Muhammad b. Hatim, Muhammad b. Bakr, Ahmad b. 'Uthman Naufali, Abu 'Asim, Ibn Juraij.

Sahih Muslim Book 1, Hadith 269