Sayyiduna Usamah bin Sharik (may Allah be pleased with him) said: The Bedouins came to the Messenger of Allah (peace and blessings be upon him) and said: O Messenger of Allah, is there any harm upon us in such-and-such? Is there any harm upon us in such-and-such? He (peace and blessings be upon him) said: "There is no harm; Allah has removed harm, except for the one who assails the honour of his brother; that is the harm." They said: O Messenger of Allah, should we seek medical treatment? He (peace and blessings be upon him) said: "Seek treatment, for Allah, the Mighty and Majestic, has not sent down any disease without also sending down its cure, except old age." They said: O Messenger of Allah, what is the best thing a human being has been given? He (peace and blessings be upon him) said: "Good character."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 476