(37) The Book of Fighting [The Prohibition of Bloodshed]
كتاب تحريم الدم
(22) Chapter: The One Who is Killed Defending His Wealth
(22) باب مَنْ قُتِلَ دُونَ مَالِهِ ‏‏
Sunan an-Nasa'i 4091 
It was narrated from Sa'eed bin Zaid that:
The Prophet [SAW] said: "Whoever is killed defending his wealth, he is a martyr."
أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا عَبْدَةُ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ إِسْحَاقَ، عَنِ الزُّهْرِيِّ، عَنْ طَلْحَةَ بْنِ عَبْدِ اللَّهِ بْنِ عَوْفٍ، عَنْ سَعِيدِ بْنِ زَيْدٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ مَنْ قَاتَلَ دُونَ مَالِهِ فَهُوَ شَهِيدٌ ‏"‏ ‏.‏
Grade :  Sahih (Darussalam)
Reference : Sunan an-Nasa'i 4091
In-book reference : Book 37, Hadith 126
English translation : Vol. 5, Book 37, Hadith 4096