2 Chronicles 29:20-30

20 Then Hezekiah the king rose early, and gathered the rulers of the city, and went up to the house of the LORD.
21 And they brought seven bullocks, and seven rams, and seven lambs, and seven hegoats for a sin offering for the kingdom and for the sanctuary and for Judah. And he commanded the priests, the sons of Aaron, to offer them on the altar of the LORD.
22 So they killed the bullocks, and the priests received the blood and sprinkled it on the altar. Likewise, when they had killed the rams they sprinkled the blood upon the altar. They killed also the lambs, and they sprinkled the blood upon the altar.
23 And they brought forth the hegoats for the sin offering before the king and the congregation, and they laid their hands upon them.
24 And 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.
25 And 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.
26 And the Levites stood with the instruments of David, and the priests with the trumpets.
27 And 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.
28 And all the congregation worshiped, and the singers sang and the trumpeters sounded; and all this continued until the burnt offering was finished.
29 And when they had made an end of offering, the king and all who were present with him bowed themselves and worshiped.
30 Moreover Hezekiah the king and the princes commanded the Levites to sing praise unto the LORD with the words of David and of Asaph the seer. And they sang praises with gladness, and they bowed their heads and worshiped.