Sayyiduna Usamah bin Sharik (may Allah be pleased with him) said: We were with the Messenger of Allah (peace and blessings be upon him) when some Bedouins came and asked: O Messenger of Allah, should we seek medical treatment? He (peace and blessings be upon him) said: "Yes, Allah, the Mighty and Majestic, has not sent down any disease without also sending down its cure."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 471