Deuteronomy 17:11-12

111In accordance with the 2terms of the law about which they instruct you, and in accordance with the verdict which they tell you, you shall act; you shall not turn aside from the word which they declare to you, to the right or the left.

12But the person who acts 3insolently by not listening to the priest who stands there to serve the Lord your God, nor to the judge, that person shall die; so you shall eliminate the evil from Israel.