Narrated `Aisha:
(the wife of the Prophet) I asked Allah's Messenger (ﷺ) about the plague. He told me that it was a Punishment sent by Allah on whom he wished, and Allah made it a source of mercy for the believers, for if one in the time of an epidemic plague stays in his country patiently hoping for Allah's Reward and believing that nothing will befall him except what Allah has written for him, he will get the reward of a martyr."
Narrated `Aisha:
I asked Allah's Messenger (ﷺ) about the plague. He said, "That was a means of torture which Allah used to send upon whom-so-ever He wished, but He made it a source of mercy for the believers, for anyone who is residing in a town in which this disease is present, and remains there and does not leave that town, but has patience and hopes for Allah's reward, and knows that nothing will befall him except what Allah has written for him, then he will get such reward as that of a martyr."
Jabir b. Abdullah reported that Allah's Messenger (ﷺ) visited Umm Sa'ib or Umm Musayyib and said: Umm Sa'ib or Umm Musayyib. why is it that you are shivering? She said:" It is fever and may it not be blessed by Allah, whereupon he (the Holy Prophet) said: Don't curse fever for it expiates the sin of the children of Adam just as furnace removes the alloy of iron.
'Amr b. Sharid reported on the authority of his father that there was in the delegation of Thaqif a leper. Allah's Messenger (ﷺ) sent a message to him: We have accepted your allegiance, so you may go.