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:

Matthew Henry's Commentary on Deuteronomy 17:9

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.