Deuteronomy 17:8-11

If there arises a matter too hard for you in judgment–between one kind of bloodshed and another, between one legality and another, between one kind of assault and another, matters of controversy within your towns–then arise and go to the place which the Lord your God chooses. And you shall come to the Levitical priests and to the judge who is in office in those days, and you shall consult them and they shall make clear to you the decision. And you shall do according to the decision which they declare to you from that place which the Lord chooses; and you shall be watchful to do according to all that they tell you; According to the decision of the law which they shall teach you and the judgment which they shall announce to you, you shall do; you shall not turn aside from the verdict they give you, either to the right hand or the left.