2 Chronicles 30:15-16 NIV

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

References for 2 Chronicles 30:15

16 Then they took up their regular positions as prescribed in the Law of Moses the man of God. The priests splashed against the altar the blood handed to them by the Levites.

References for 2 Chronicles 30:16