And they set the priests in their divisions, and the Levites in their courses over the works of God in Jerusalem, as it is written in the book of Moses.
Moreover David and the chief officers of the army separated for the ministry the sons of Asaph, and of Heman, and of Idithun: to prophesy with harps, and with psalteries, and with cymbals according to their number serving in their appointed office.
And the priests stood in their offices: and the Levites with the instruments of music of the Lord, which king David made to praise the Lord: because his mercy endureth for ever, singing the hymns of David by their ministry. And the priests sounded with trumpets before them; and all Israel stood.