Deuteronomy 17:9-11

You are to go to the Levitical priests and to the judge who presides at that time. Inquire of them, and they will give you a verdict in the case.

You must abide by the verdict they give you at the place the LORD will choose. Be careful to do everything they instruct you,

according to the terms of law they give and the verdict they proclaim. Do not turn aside to the right or to the left from the decision they declare to you.