Deuteronomy 17:8-10

8“Suppose a matter arises that is too hard for you to judge—over bloodshed, legal claims or assault—matters of controversy within your gates. Then you should go up to the place Adonai your God chooses,

9and come to the Levitical kohanim and the judge in charge at that time. And you will inquire, and they will tell you the sentence of judgment.

10You are to act according to the sentence they tell you from that place Adonai chooses, and take care to do all that they instruct you.