Is what a Shaykh and Imam of a mosque does—treating people with the Holy Quran, and what he described to me as using Surat Al-Baqarah on olive oil, Surat Yasin on water, along with "tahlil," "istighfar," prayers upon the Prophet, and honey—considered permissible, or is there anything forbidden in it?

It is not permissible for a woman to seek treatment with Ruqyah or medicine from a man, except in cases of extreme necessity, such as the absence of a female practitioner. This must be accompanied by adherence to the hijab, the presence of a mahram, and limiting touch or exposure only to the extent of the need. The Salaf permitted a man to treat a woman out of necessity, but privacy (khalwa) with him is not allowed.

As for what the raqi (one who performs Ruqyah) does with the Quran, there is no objection to it. However, it is important to note that one should not believe in any special virtue for specific numbers of adhkar (remembrances) or surahs, such as Surah Yasin, unless it is established by Shari'ah. These numbers are not acts of worship, nor is treatment dependent on them.