Deuteronomy 17:8-11
8If there arises a matter too hard for you in judgment, between blood and blood, between plea and plea, and between stroke and stroke, being matters of controversy within your gates, then you shall arise, and go up to the place which the LORD your God chooses.
9You shall come to the priests who are Levites and to the judge who shall be in those days. You shall inquire, and they shall give you the verdict.
10You shall do according to the decisions of the verdict which they shall give you from that place which the LORD chooses. You shall observe to do according to all that they shall teach you.
11According to the decisions of the law which they shall teach you, and according to the judgment which they shall tell you, you shall do. You shall not turn away from the sentence which they announce to you, to the right hand, nor to the left.