2 Chronicles 30:19

15 And on the fourteenth day of the second month they slaughtered the Passover lamb. The priests and Levites were ashamed, and they consecrated themselves and brought burnt offerings to the house of the LORD.

16 They stood at their prescribed posts, according to the Law of Moses the man of God. The priests sprinkled the blood, which they received from the hand of the Levites.

17 Since there were many in the assembly who had not consecrated themselves, the Levites were in charge of slaughtering the Passover lambs for every unclean person to consecrate the lambs to the LORD.

18 A large number of the people—many from Ephraim, Manasseh, Issachar, and Zebulun—had not purified themselves, yet they ate the Passover, contrary to what was written. But Hezekiah interceded for them, saying, “May the LORD, who is good, provide atonement for everyone

19 who sets his heart on seeking God—the LORD, the God of his fathers—even if he is not cleansed according to the purification rules of the sanctuary.”

20 And the LORD heard Hezekiah and healed the people.

21 The Israelites who were present in Jerusalem celebrated the Feast of Unleavened Bread for seven days with great joy, and the Levites and priests praised the LORD day after day, accompanied by loud instruments of praise to the LORD.

22 And Hezekiah encouraged all the Levites who performed skillfully before the LORD. For seven days they ate their assigned portion, sacrificing fellowship offerings and giving thanks to the LORD, the God of their fathers.

23 The whole assembly agreed to observe seven more days, so they observed seven days with joy.

Read all of 2 Chronicles 30