Sunan Abi Dawud 4772
سنن أبي داود#4772SahihNarrated Sa'id ibn Zayd: The Prophet (ﷺ) said: He who is killed while protecting his property is a martyr, and he who is killed while defending his family, or his blood, or his religion is a martyr
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 42:177