It is reported from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that some Companions of the Messenger of Allah (peace and blessings be upon him) passed by a watering place where there was a man who had been stung by a scorpion. A man of that tribe came to the Companions and said: Is there anyone among you who performs ruqyah? One of our men has been stung by a scorpion. One of those Companions went and performed ruqyah with Surah al-Fatihah in return for some goats, and the man was cured. This Companion brought the goats to the Companions; they disliked this act and said: You have taken a wage for the Book of Allah. They came to the Messenger of Allah (peace and blessings be upon him) and informed him, and he (peace and blessings be upon him) said: "The most deserving of the things for which you take a wage is the Book of Allah."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الإجارة / 11676