How can I convince a friend of the importance of Ruqyah Shariah (Islamic exorcism/healing), especially since her father does not believe in it and considers merely reading the Qur’an sufficient, claiming that his aunt’s healing was not due to Ruqyah but to medicine? And is it true that the Prophet ﷺ forbade argumentation, and that abandoning it earns a reward?

The evil eye is real, and ruqyah is permissible. It is permissible for a person to perform ruqyah on themselves or to seek ruqyah from others who are upright in their religion, keeping in mind the hadith: "There is no ruqyah except for the evil eye or a sting," and the saying of the Prophet, peace and blessings be upon him: "Perform ruqyah for her, for she has been afflicted by a glance (evil eye)." Moreover, treating physical ailments with Al-Fatihah or other parts of the Quran is the most effective cure for one who believes firmly in Allah's promise. The response to supplication may vary according to the level of faith and certainty, but Allah may answer the desperate person even with their weak faith. The Prophet, peace and blessings be upon him, encouraged abandoning argumentation for those who have no proof, yet it may sometimes be permissible "in the best way" as a method of da'wah.