Sahih al-Bukhari 2829
Sahih al-Bukhari · Book 56: Fighting for the Cause of Allah (Jihaad) · There are seven martyrs other than killed in Jihad
Narrated Abu Huraira:
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ ، أَخْبَرَنَا مَالِكٌ ، عَنْ سُمَىٍّ ، عَنْ أَبِي صَالِحٍ ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " الشُّهَدَاءُ خَمْسَةٌ الْمَطْعُونُ، وَالْمَبْطُونُ، وَالْغَرِقُ وَصَاحِبُ الْهَدْمِ، وَالشَّهِيدُ فِي سَبِيلِ اللَّهِ " .
Allah's Messenger (ﷺ) said, "Five are regarded as martyrs: They are those who die because of plague, Abdominal disease, drowning or a falling building etc., and the martyrs in Allah's Cause."