Deuteronomy 17:9-11

And thou shalt come to the priests of the Levitical race, and to the judge, that shall be at that time: and thou shalt ask of them, and they shall shew thee the truth of the judgment.

And thou shalt do whatsoever they shall say, that preside in the place, which the Lord shall choose, and what they shall teach thee,

According to his law; and thou shalt follow their sentence: neither shalt thou decline to the right hand nor to the left hand.