Sunan an-Nasa'i 4088
سنن النسائي#4088SahihIt was narrated from Ibrahim bin Muhammad bin Talhah that he heard 'Abdullah bin 'Amr narrating:From the Prophet [SAW], that he said: "If a person's wealth is sought without right, and he fights (to protect it) and is killed, he is a martyr
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih Lighairihi
Al-AlbaniSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 37:123