This also explains why it bothers evil spirits that reside in the blood in the body which contains of waiter when reciting holy scriptures with intention , and the Quran tells us thats unseen evil spirits can not hear the recitation of the Qur'an, they can not stand to hear it.

also when we recite Quran with a bowl of water in front of us the water gets changed and in this way its holy which you can use to spat on the possessed victim, also if you want a quicker reaction.