well I wondered what ruqya was
and look at this !
http://daarussalaam.com/D-RUQYAH/Dindex1.htm
The yellow bits in English match the ones in Arabic
and a lot of it refers to 'sayings' rather than the book itself
so isnt as it were 'gospel truth' - see thread on who wrote the gospels
and apparently they agree it is pre-Islamic which is a surprise
that is that jinn possession, evil eye were a social construct that Islam had to cope with.