And the priests waited on their offices
Performed them, some in offering sacrifices, others in blowing trumpets, as it may be explained from the latter part of the verse:
the Levites also with instruments of music of the Lord, which David the
king had made to praise the Lord;
under a divine direction, on which the Levites played to the songs of praise offered to the Lord, and by which they made music sacred to him:
because his mercy endureth for ever;
which, as it was the close of their songs of praise, was the cause of them:
when David praised by their ministry;
the songs sung being composed by him, and the instruments they played upon being of his invention, and used by his order:
and the priests sounded trumpets before them;
or rather over against them, that is, over against the Levites, as they were singing and playing on the instruments of music:
and all Israel stood;
while this sacred and delightful service was performing, they both stood up, and stood by the priests and Levites, and joined with them in praising the Lord.