Abu Huraira reported God’s messenger as saying, “There are five types of martyr:one who dies of plague, one who dies of an internal complaint, one who is drowned, one who is killed by his house falling on him, and the martyr in God’s path.” (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب الجنائز / 1546
Hadith Gradingالألبانی:مُتَّفَقٌ عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (2829) و مسلم (164/ 1914)»