It is narrated from Sa'id that he said: I was with Salman when he visited a sick person from the Kindah tribe. When Salman came to the patient, he said: "Glad tidings! Indeed, Allah makes the illness of a believer an expiation (for sins) and a cause of (His) pleasure. And the illness of a wicked person is like when the people of a household tie up a camel and then release it. It does not know why it was tied up or why it was released."