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, who is the best person? He (peace and blessings be upon him) said: "The one among them who is best in character." 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 sending down its cure."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 475