Shaykhul-Islam Ibn Taymīyyah (may Allāh have mercy upon him):
If the Jinn is from the Afārīt and he (the one performing the Ruqyaa) is weak, they can harm him. Therefore, the likes of this person is to protect himself with the recitation of that which gives refuge and protection like Āyah al-Kursī, the Mu’auwwidhāt (Sūrah al-Falaq and Sūrah an-Nās), the making of the prayer, supplication and the likes of that from that which strengthens the faith. He is also to keep away from the acts of sins which (cause the enemies) to gain authority over him. Continue reading