Deuteronomy 17:8-11

If there arise a matter too hard for thee in judgment, between blood and blood, between plea and plea, and between stroke and stroke, being matters of controversy within thy gates: then shalt thou arise, and get thee up into the place which the LORD thy God shall choose; and thou shalt come unto the priests the Levites, and unto the judge that shall be in those days, and inquire; and they shall show thee the sentence of judgment: and thou shalt do according to the sentence, which they of that place which the LORD shall choose shall show thee; and thou shalt observe to do according to all that they inform thee: according to the sentence of the law which they shall teach thee, and according to the judgment which they shall tell thee, thou shalt do: thou shalt not decline from the sentence which they shall show thee, to the right hand, nor to the left.