Numbers 27:21

And he shall stand before Eleazar, the priest, who shall ask counsel for him after the judgment of Urim before the Lord; he was dependent upon the counsel of the high priest as given by means of the mysterious Urim, for he had no direct access to God, as Moses had, Exodus 28:30. At his word, in accordance with the utterance which the high priest would make by means of the Urim and Thummim entrusted to him, shall they go out, and at his word they shall come in, both he and all the children of Israel with him, even all the congregation.