The ruling on drinking Zamzam water and eating black seed for treatment

Question:
He says: Honorable Shaykh, does drinking Zamzam water or eating black seed provide a cure for the one who has been subjected to sorcery? What about honey and black seed, and whether the measure of healing is the illness?

Answer:
The Messenger (peace and blessings be upon him) said that all of these are among the causes of healing because they are blessed and contain good. Therefore, using them is among the permissible medicines, as Ibn al-Qayyim stated. These are among the permissible medicines: honey, black seed, Zamzam water, and other medicines in which Allah has placed specific properties.
If one combines the recitation with Zamzam water, that is good. If the intention in drinking from Zamzam water is for a specific purpose, there is an obstacle, because they were selling it in the two Sacred Mosques recently. The time itself, they would take water from Zamzam and go around the people giving them lessons, and no one objected to this. So, selling Zamzam water has an obstacle. It is the selling of ruqyah (healing by Qur'anic recitation) that is not permissible.