John Wesley on 1 Chronicles 23:4

Officers - To take care that all the work of the temple about sacrifices should be punctually performed, either by themselves or others: which they were not to do all at once, but by courses, a thousand at a time. Judges - Not in the affairs of the temple; there the priests presided; but in several parts of the kingdom, where they assisted the princes and elders of every tribe, in the administration of justice.