Deuteronomy 17:9

and thou shalt come unto the priests, the Levites, the children of Levi, and unto the judge that shall be in those days, a sort of chief justice by the side of the high priest, and enquire; and they shall show thee the sentence of judgment, interpret the law which would find its application in that case, if necessary, after consulting the Lord directly, 1 Samuel 28:6;