The Ruling on Going to Diviners

Your Eminence! One of the brothers had something stolen from him, so some people advised him to go to a diviner. He knows fully well that going to a diviner is shirk (associating partners with Allah); however, he went to him to benefit from him economically only, because he knows that he seeks the aid of jinn who have knowledge that he does not possess.
So is his going with this intention permissible or not permissible?Ask him first: Did the thief find out in order to know that going to these diviners, who are in reality ignorant people and fools in intellect,And he (peace and blessings be upon him) said: (Whoever goes to a diviner and asks him, his prayer will not be accepted for forty days).