2 Chronicles 29:15-31

They assembled their brothers, consecrated themselves, and went in to cleanse the house of the LORD, according to the commandment of the king by the words of the LORD. So the priests went in to the inner part of the house of the LORD to cleanse it, and every unclean thing which they found in the temple of the LORD they brought out to the court of the house of the LORD. Then the Levites received it to carry out to the Kidron valley. Now they began the consecration on the first day of the first month, and on the eighth day of the month they entered the porch of the LORD. Then they consecrated the house of the LORD in eight days, and finished on the sixteenth day of the first month. Then they went in to King Hezekiah and said, “We have cleansed the whole house of the LORD, the altar of burnt offering with all of its utensils, and the table of showbread with all of its utensils. Moreover, all the utensils which King Ahaz had discarded during his reign in his unfaithfulness, we have prepared and consecrated; and behold, they are before the altar of the LORD.” Then King Hezekiah arose early and assembled the princes of the city and went up to the house of the LORD. They brought seven bulls, seven rams, seven lambs and seven male goats for a sin offering for the kingdom, the sanctuary, and Judah. And he ordered the priests, the sons of Aaron, to offer them on the altar of the LORD. So they slaughtered the bulls, and the priests took the blood and sprinkled it on the altar. They also slaughtered the rams and sprinkled the blood on the altar; they slaughtered the lambs also and sprinkled the blood on the altar. Then they brought the male goats of the sin offering before the king and the assembly, and they laid their hands on them. The priests slaughtered them and purged the altar with their blood to atone for all Israel, for the king ordered the burnt offering and the sin offering for all Israel. He then stationed the Levites in the house of the LORD with cymbals, with harps and with lyres, according to the command of David and of Gad the king’s seer, and of Nathan the prophet; for the command was from the LORD through His prophets. The Levites stood with the musical instruments of David, and the priests with the trumpets. Then Hezekiah gave the order to offer the burnt offering on the altar. When the burnt offering began, the song to the LORD also began with the trumpets, accompanied by the instruments of David, king of Israel. While the whole assembly worshiped, the singers also sang and the trumpets sounded; all this continued until the burnt offering was finished. Now at the completion of the burnt offerings, the king and all who were present with him bowed down and worshiped. Moreover, King Hezekiah and the officials ordered the Levites to sing praises to the LORD with the words of David and Asaph the seer. So they sang praises with joy, and bowed down and worshiped. Then Hezekiah said, “Now that you have consecrated yourselves to the LORD, come near and bring sacrifices and thank offerings to the house of the LORD.” And the assembly brought sacrifices and thank offerings, and all those who were willing brought burnt offerings.