2 Chronicles 29:26 KJV

24And the priests killed them, and they made reconciliation with their blood upon the altar, to make an atonement for all Israel: for the king commanded that the burnt offering and the sin offering should be made for all Israel.

25And he set the Levites in the house of the LORD with cymbals, with psalteries, and with harps, according to the commandment of David, and of Gad the king’s seer, and Nathan the prophet: for so was the commandment of the LORD by his prophets.

26And the Levites stood with the instruments of David, and the priests with the trumpets.

27And Hezekiah commanded to offer the burnt offering upon the altar. And when the burnt offering began, the song of the LORD began also with the trumpets, and with the instruments ordained by David king of Israel.

28And all the congregation worshipped, and the singers sang, and the trumpeters sounded: and all this continued until the burnt offering was finished.