Treasury of Scripture Knowledge
And the priests the sons of Levi shall come near; for them the LORD thy God hath chosen to minister unto him, and to bless in the name of the LORD; and by their word shall every controversy and every stroke be tried:
At that time the Lord set apart the tribe of Levi to carry the ark of the covenant of the Lord, to stand before the Lord to serve Him and to bless in His name until this day.
For the Lord your God has chosen him and his sons from all your tribes, to stand and serve in the name of the Lord forever.
Then the Lord spoke to Moses, saying,
1 Chronicles 23:13
The sons of Amram were Aaron and Moses. And Aaron was set apart to sanctify him as most holy, he and his sons forever, to burn incense before the Lord, to minister to Him and to bless in His name forever.
By their word
If any case is too difficult for you to decide, between one kind of homicide or another, between one kind of lawsuit or another, and between one kind of assault or another, being cases of dispute in your courts, then you shall arise and go up to the place which the Lord your God chooses.
For the lips of a priest should preserve
knowledge, and men should seek instruction from his mouth; for he is the messenger of the Lord of hosts.