Deuteronomy 17:8-10

8“If a case is too difficult for you — concerning bloodshed, lawsuits, or assaults  — cases disputed at your city gates, then go up to the place the Lord your God chooses.

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.