These are the sons of Levi in their kindreds and families, princes by their courses: and the number of every head that did the works of the ministry of the house of the Lord from twenty years old and upward.
Now these are David's last words. David the son of Isai said: The man to whom it was appointed concerning the Christ of the God of Jacob, the excellent psalmist of Israel said:
And they are to be under the hand of the sons of Aaron for the service of the house of the Lord, in the porches, and in the chambers, and in the place of purification, and in the sanctuary, and in all the works of the ministry of the temple of the Lord.