Moreover, David and the captains of the host set apart for the service certain of the sons of Asaph, and of Heman, and of Jeduthun, who should prophesy with harps, with psalteries, and with cymbals: and the number of those who did the work according to their service was:
who should prophesy with harps, with psalteries, and with cymbals; sing psalms, hymns, and spiritual songs, endited by the Holy Spirit of God; which contained in them prophecies concerning things to come, particularly relating to the Messiah, of which there are many in the book of Psalms; and to the tunes of these they played on the above instruments of music: