Sayyidina Sa’eed ibn Zayd (RA) reported that Allah’s Messenger (SAW) said, “He who is killed in defence of his property is a martyr. He who is killed in self defence is a martyr. He who is killed in defence of his religion is a martyr. And, he who is killed in defence of his family is a martyr.”
[Abu Dawud 4772, Nisai 4102, Ibn e Majah 2580, Ahmed 1652]