Is it permissible, Islamically, to seek the help of a person who claims to know the unseen and the location of stolen items through "water" to recover them?

The person who can show you the thief of stolen money and their location in water is a sorcerer (magician), because these methods can only be performed by a sorcerer. Sorcery is "every hidden matter whose cause is concealed and which is imagined to be other than its reality, and which involves delusion and deception." A sorcerer can only discover stolen goods through jinn, who will not serve him unless he approaches them through disbelief (kufr) and forbidden acts. Sorcery falls under shirk (associating partners with Allah) due to the use of devils and reliance on them, and due to the claim of knowing the unseen.

Therefore, it is not permissible for a Muslim to go to such a person, believe them, or seek their help, because the Prophet, peace and blessings be upon him, said: "He is not one of us who practices or seeks omens, or practices or seeks divination, or practices or seeks sorcery." And he said: "Whoever goes to a diviner or sorcerer or soothsayer and asks him about something and believes what he says, has disbelieved in what was revealed to Muhammad, peace and blessings be upon him." And he said: "Whoever goes to a diviner and asks him about something, Allah will not accept his prayer for forty nights." This action involves aiding and encouraging the sorcerer, which is aiding in disobedience to Allah. It also promotes sorcery and establishes its foundations in society, and undermines the natural methods of uncovering criminals.