NET
20 He sacrificed all the priests of the high places on the altars located there, and burned human bones on them. Then he returned to Jerusalem.
Darby
20 And he sacrificed upon the altars all the priests of the high places that were there, and burned men's bones upon them. And he returned to Jerusalem.
KJV
20 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.