Asalam o alaikum,

I would like to know opinion on Peer Usman Ghani\’s way of spiritual healing. I have come across few people who have actually gotten cancer cured and I know for a fact that quranic verses are recited on hot oil that is then applied to the diseased body part. And also he or his students make no material gains whatsoever. He teaches it to anyone who may not have access to him or any of his students and ask the person to make three promises girsy. 1) That he will never accept aby money or gift etc fir doung this. 2) we will bever deny anyone of the treatment 3) he will not share it with anyone without his permission.
He claims he does istakhara to diagnose and he is the only one who does the diagnosis and not his students. One has to undergo 20 consecutive weekly dums and then the frquency and the duration may vary according to the severity of the problem. My concern is not if it works or not. But instead if it is trespassing, a bidat. I fear for my eman. But then but I also do not want to deprive my child of any goodness that his way of treatment may have for her if it is permissible by Allah.
I am not sure if muwakals/jinaat are involved. But he claims with utmost certainty that it is not the case. Its the miracle of quranic verses.
Below is just one of the many links you can find on google regarding peer usman

Kindly advice at your earliest convenience.
Jazakallah
Ayefa