2 Chronicles 30:13-15

13And many people came together in Jerusalem to keep the Feast of Unleavened Bread in the second month, a very great assembly.

14They set to work and removed the altars that were in Jerusalem, and all the altars for burning incense they took away and threw into the brook Kidron.

15And they slaughtered the Passover lamb on the fourteenth day of the second month. And the priests and the Levites were ashamed, so that they consecrated themselves and brought burnt offerings into the house of the Lord.