Jami` at-Tirmidhi 1421
جامع الترمذي#1421SahihNarrated Zaid:that he heard the Messenger of Allah (ﷺ) saying: "Whoever is killed over his wealth then he is a martyr, and whoever is killed over his religion, then he is a martyr, and whoever is killed over his blood, then he is martyr, and whoever is killed over his family, then he is martyr
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 16:38