Sayyiduna Ibn Mas'ud (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Allah has not sent down any disease except that He has also sent down its cure; whoever knows it, knows it, and whoever remains unaware of it, remains unaware."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 4334
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهمام العوذي و إن سمع من عطاء بن السائب بعد اختلاطه - متابع.