A--- The lawful Ruqyah comprises only parts of the Glorious Qur'an and the Prophetic Sunnah, pronounced in Arabic, while the one who recites them and on whom they are recited believe in that they can not be effective unless by Allah's Leave. Gabriel (Peace be upon him) practiced Ruqyah for the sake of Prophet Muhammad (Peace be upon him) who did the same to many of his honorable companions and did not prevent them from practicing it. Rather, he ordered them to practice it and allowed them to receive payment thereto. All this can be found in the two Sahihs:

Bukhari and Muslim.