Narrated Ibn `Abbas: The Prophet went to visit a sick bedouin. Whenever the Prophet went to a patient, he used to say to him, Don't worry, if Allah will, it will be expiation (for your sins): The bedouin said, You say expiation? No, it is but a fever that is boiling or harassing an old man and will lead him to his grave without his will. The Prophet said, Then, yes, it is so.