Sayyiduna Usamah bin Sharik (may Allah be pleased with him) said: I was present with the Prophet (peace and blessings be upon him) when Bedouins came and said: Is there any harm upon us in such-and-such, in such-and-such, concerning matters of theirs in which there was no harm? He (peace and blessings be upon him) said: "O servants of Allah, Allah has removed harm, except for the one who assails the honour of a Muslim; he is the one who has fallen into harm and is ruined." They said: O Messenger of Allah, should we seek medical treatment? He (peace and blessings be upon him) said: "Yes, seek treatment, for Allah, the Mighty and Majestic, has not sent down any disease without also placing its cure, except for one disease." 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 / 463