In a narration of al-Tabarani there are these words: "My mother took me to a man who was seated by a graveyard. My mother said: O Messenger of Allah! The Prophet (peace and blessings be upon him) said: I am at your service. Then my mother brought me close to the Prophet (peace and blessings be upon him), and the Prophet (peace and blessings be upon him) began to blow and to recite some words; I do not know what they were. Later I asked my mother what those words were, and she told me that he (peace and blessings be upon him) had recited: 'O Lord of mankind, remove the affliction; grant healing, You are the Healer; there is no healer but You.'" The narrators of Ahmad and the narrators of this chain are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطب / 8455