The use of incantation and supplications is allowed for treatment, provided their content is the remembrance of Allah and they are written in a comprehensible language. Otherwise their content might well contain something polytheistic without one being aware of it. ‘Awf ibn Malik reported: “We practiced incantation in the pre-islamic days so we asked the Messenger of Allah, ‘What is your opinion about it?’ He said: ‘Let me see your incantations.
There is nothing wrong with the incantation that does not contain any polytheistic statements’.” (Muslim and Abu Daw-ud)
Ar-Rabi’ says: “I asked Ash-Shafi’i about incantation. He replied: ‘There is nothing wrong in using the Qur’an for incantation or any other words that contain Allah’s remembrance.’ Then I asked him: ‘Is it permissible for Muslims to approach the Christians and the Jews for incantation?’ Ash-Shafi’i replied: ‘Yes, provided they use the revelation from Allah and words that contain His remembrance’.”