And they set the priests in their divisions, and the Levites in their courses, for the service of God, which is at Jerusalem; as it is written in the book of Moses.
Moreover David and the captains of the host separated to the service of the sons of Asaph, and of Heman, and of Jedu´thun, who should prophesy with harps, with psalteries, and with cymbals: and the number of the workmen according to their service was:
And the priests waited on their offices: the Levites also with instruments of music of the Lord, which David the king had made to praise the Lord, because his mercy endureth for ever, when David praised by their ministry; and the priests sounded trumpets before them, and all Israel stood.