2 Chronicles 30:13-15

13Now many people were gathered at Jerusalem to celebrate the Feast of Unleavened Bread in the second month; it was a very large assembly.

14They took action and removed the [pagan] altars which were in Jerusalem; they also removed all the incense altars and threw them into the Brook Kidron [the dumping place for the ashes of such repulsive things].

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