2 Chronicles

And he appointed, according to the order of David his father, the courses of the priests to their service, and the Levites to their charges, to praise and minister before the priests, as the duty of every day required: the porters also by their courses at every gate: for so had David the man of God commanded.

Moreover four thousand were porters; and four thousand praised the Lord with the instruments which I made, said David, to praise therewith.

And with them Heman and Jeduthun with trumpets and cymbals for those that should make a sound, and with musical instruments of God. And the sons of Jeduthun were porters.

Moreover David and the captains of the host separated to the service 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 the workmen according to their service was:

So the number of them, with their brethren that were instructed in the songs of the Lord, even all that were cunning, was two hundred fourscore and eight.