Narrated Ibn Mas`ud: I visited the Prophet while he was having a high fever. I touched him an said,   You have a very high fever   He said,   Yes, as much fever as two me of you may have.   I said.   you will have a double reward?   He said,   Yes No Muslim is afflicted with hurt caused by disease or some other inconvenience, but that Allah will remove his sins as a tree sheds its leaves.