Moreover, David and the captains of the host separated to
the service
Of singing the praises of God; this was done by the princes of the people, and the chief of the priests, who were gathered together, and before whom the lots were cast, both for priests and Levites, and now here for the singers, see ( 1 Chronicles 22:2 ) ( 24:6 ) and those that were separated were
of the sons of Asaph, and of Heman, and of Jeduthun;
or Ethan, the three precentors, or chief of the singers:
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:
and the number of the workmen, according to their service, was;
as follows.