What is the ruling on one who intends to go to a flowing river near the grave of a wali (close friend of Allah) in order to seek healing from specific diseases?

Question:
Honorable Shaykh, may Allah grant you success. He says: What is the ruling on one who intends to go to a flowing river near the grave of so-and-so wali for the sake of its blessing, in order to seek healing from specific diseases? What is the ruling on this action? He notes that they say it is proven to work.

Answer:
This is not permissible. This is seeking blessing from the dead. You say the blessing of this river is due to the blessing of the dead person. This is seeking blessing from the dead, and this is shirk (associating partners with Allah). It is not permissible. And the fact that they say it is proven to work does not indicate that it is permissible, because a person’s need may be fulfilled even if his action is incorrect, as a trial for him and a luring of him into sin. As previously mentioned to you, the fulfillment of needs is not evidence for the permissibility of the action.