If you have been praying for victory, [O believers] - victory has now indeed come unto you. And if you abstain [from sinning], it will be for your own good; but if you revert to it, We shall revoke [Our promise of aid] - and never will your community be of any avail to you, however great its numbers: for, behold, God is [only] with those who believe !
Al-Anfal (The Spoils of War) Verse 19
I heard the Prophet saying, "Whoever is killed while protecting his property then he is a martyr."
Sahih Bukhari: Volume 3, Book 43, Number 660