Narrated 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.”
‘A’isha said, “I asked God’s messenger about plague and he told me it is a punishment God sends upon whomsoever He wills, but God has made it a blessing to the believers. When plague comes, anyone who stays patiently in his town looking for his reward from God, knowing that only what God has decreed for him can happen to him, will have a reward like that of a martyr.”
Abu Musa reported God’s messenger as saying, “When a man is ill or on a journey, what he was accustomed to do when staying at home and well will be recorded for him.”(This refers to his observance of salat, etc., cf. the traditions of ‘Abdallah b. 'Amr and Anas on p. 326.)