Silsilat al-Ahadith al-Sahihah

An Ansari companion says that the Messenger of Allah (peace and blessings be upon him) went to visit a wounded person and said: "Call the physician of such-and-such tribe for him." They called him, and he came and said: "O Messenger of Allah! Does medicine suffice as a cure?" The Prophet (peace and blessings be upon him) said: "Subhan Allah! Allah, the Exalted, has sent down a cure for every disease He has sent down upon the earth."