Is it permissible for a Muslim to drink from the hand of a Christian priest who claims that the Lord showed him in a dream a tree that cures all chronic diseases?

This priest, who claims to have had a vision, is a liar and mistaken. If it is proven that someone showed him this alleged tree that cures people, then that is not from Allah; rather, it is from the devils who mislead people. This would be akin to the satanic whisperings mentioned in the Holy Qur'an in the verse: "And indeed, the devils inspire their allies to argue with you. And if you obey them, you are indeed polytheists" (6:121). Therefore, it is not permissible for Muslims to seek him out, believe him, or go to him. Rather, it is obligatory to disbelieve him and warn against him.