Deuteronomy 17:9-12

9You are to go to the Levitical priests and to the judge who presides at that time. Ask, and they will give you a verdict in the case.

10You must abide by the verdict they give you at the place the Lord chooses. Be careful to do exactly as they instruct you.

11You must abide by the instruction they give you and the verdict they announce to you. Do not turn to the right or the left from the decision they declare to you.

12The person who acts arrogantly, refusing to listen either to the priest who stands there serving the Lord your God or to the judge, must die. You must purge the evil from Israel.