عَنْ أَبِي مُوسَى قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَطْعِمُوا الْجَائِعَ وَعُودُوا الْمَرِيض وفكوا العاني» . رَوَاهُ البُخَارِيّ

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.)