2 Chronicles 33:15

And he took away the strange gods, and the idol out of the
house of the Lord
Which he had set there, ( 2 Chronicles 33:7 )

and all the altars that he had built in the mount of the house of the
Lord, and in Jerusalem;
see ( 2 Chronicles 33:4 2 Chronicles 33:5 ) ,

and cast them out of the city;
perhaps into the brook Kidron; all this he did to show the sincerity of his repentance for his idolatry, and his abhorrence of it.