‘Amir ar-Ram told that God’s messenger mentioned illnesses and said, "When a believer is afflicted by illness and God who is great and glorious cures him of it, it serves as an atonement for his previous sins and a warning to him for the future; but when a hypocrite becomes ill and then is cured he is like a camel which has been tethered and then let loose by its owners, but does not know why they tethered it and why they let it loose.” When a man asked God’s messenger what illnesses were, adding that he swore by God he had never been ill, he said, "Get up and leave us ; you do not belong to our number.”
Jabir reported God’s messenger as saying, "On the day of resurrection, when people who have suffered affliction are given their reward, those who are healthy will wish their skins had been cut to pieces with scissors when they were in the world.”
Tirmidhi transmitted it, saying that this is a gharib tradition.
Abu Sa'id reported God’s messenger as saying, "When you go in to visit an invalid, express a hope that he will live long. That will not avert anything, but it will comfort him.”
Tirmidhl and Ibn Majah transmitted it, and Tirmidhi said this is a gharib tradition.
‘Abdallah b. Shikhkhir reported God’s messenger as saying, “The son of Adam was created with ninety-nine trials at his side. If the trials miss him he falls into decrepitude till he dies.”
Tirmidhi transmitted it, saying that this is a gharib tradition.