Deuteronomy 17:10

And Moses said to his father-in-law, “Because the people come to me to inquire of God.

and so as to instruct the sons of Israel in all the statutes which Yahweh has spoken to them through Moses.”

“Then the priests, the sons of Levi, shall come near, for Yahweh your God has chosen them to minister for Him and to bless in the name of Yahweh; and every dispute and every assault shall be settled by them.

“If there is a dispute between men and they go to court for judgment, and the judges judge their case, and they justify the righteous and condemn the wicked,

“Thus says Yahweh of hosts, ‘Ask now the priests about the law:

“For the lips of a priest should keep knowledge, and men should seek instruction from his mouth; for he is the messenger of Yahweh of hosts.