With the authority of the Lord ¹  he cried out against the altar, “O altar, altar! This is what the Lord says, ‘Look, a son named Josiah will be born to the Davidic dynasty. He will sacrifice on you the priests of the high places who offer sacrifices on you. Human bones will be burned on you.’” ² 

He eliminated ¹  the pagan priests whom the kings of Judah had appointed to offer sacrifices ²  on the high places in the cities of Judah and in the area right around Jerusalem. (They offered sacrifices ³  to Baal, the sun god, the moon god, the constellations, and all the stars in the sky.)