David and the officers of the service set apart for the ministry the sons of Asaph, Heman and Jeduthun, who prophesied with harps, lyres and cymbals. The text gives the list of those who performed this service. The sons of Asaph, four of them, were under the direction of Asaph, who prophesied under the direction of the king. Of Jeduthun six sons are named, who with the lyre prophesied in thanksgiving and praise to the Lord, under the direction of their father.
Of Heman, the king's seer, fourteen sons and three daughters are named, because God gave Heman that large family, and all were under the direction of their father for song in the house of the Lord with cymbals, harps and lyres. Asaph, Jeduthun and Heman were under the order of the king. Their number, with their brothers trained in singing to the Lord, all of them skillful, was two hundred eighty-eight.
To assign the duties they cast lots, small and great alike, teacher and pupil. The first lot fell to Joseph, of the sons of Asaph, and the others followed until twenty-four divisions were complete, each one with twelve persons, sons and brothers.