Sayyiduna Anas (may Allah be pleased with him) says: I heard the Messenger of Allah (peace and blessings be upon him) saying: "Whoever visits a sick person, he immerses himself in the mercy of Allah, and when he sits with him, mercy covers him." When the Messenger of Allah (peace and blessings be upon him) had finished saying what he wanted to say, I asked: This is for the one who visits the sick, so what is there for the sick person? He (peace and blessings be upon him) replied: "When a person remains ill for three days, he becomes purified from sins just as on the day his mother gave birth to him."