9 And come before the priests, the Levites, or before him who is judge at the time: and they will go into the question and give you a decision: 10 And you are to be guided by the decision they give in the place named by the Lord, and do whatever they say: 11 Acting in agreement with their teaching and the decision they give: not turning to one side or the other from the word they have given you. 12 And any man who, in his pride, will not give ear to the priest whose place is there before the Lord your God, or to the judge, is to be put to death: you are to put away the evil from Israel.
Matthew Henry's Commentary on Deuteronomy 17:9-12
Commentary on Deuteronomy 17:8-13
(Read Deuteronomy 17:8-13)
Courts of judgment were to be set up in every city. Though their judgment had not the Divine authority of an oracle, it was the judgment of wise, prudent, experienced men, and had the advantage of a Divine promise.