9 Although the priests of the high places did not serve at the altar of the LORD in Jerusalem, they ate unleavened bread with their fellow priests.

Read 2 Kings 23:9 Using Other Translations

Nevertheless the priests of the high places came not up to the altar of the LORD in Jerusalem, but they did eat of the unleavened bread among their brethren.
However, the priests of the high places did not come up to the altar of the LORD in Jerusalem, but they ate unleavened bread among their brothers.
The priests who had served at the pagan shrines were not allowed to serve at the LORD ’s altar in Jerusalem, but they were allowed to eat unleavened bread with the other priests.