Read 2 Kings 23:20 Using Other Translations
And he slew all the priests of the high places that were there upon the altars, and burned men's bones upon them, and returned to Jerusalem.
And he sacrificed all the priests of the high places who were there, on the altars, and burned human bones on them. Then he returned to Jerusalem.
He executed the priests of the pagan shrines on their own altars, and he burned human bones on the altars to desecrate them. Finally, he returned to Jerusalem.