It is narrated from Imam al-Zuhri (may Allah have mercy on him): "Whenever the Prophet (peace and blessings be upon him) suffered some physical pain or illness, he (peace and blessings be upon him) would blow into both his hands (while reciting ruqyah), then wipe them both over his blessed face."
Imam Musaddad recorded it, and its chain is mursal sahih (authentic but with the Companion omitted).
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الطب / 2480
Hadith Gradingمحدثین:إسناده مرسل
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :مرسل. » «أخرجه مصنف عبد الرزاق برقم: 19782»