1 Chronicles 23:4 - Joseph Benson’s Commentary on the Old and New Testaments

To set forward the work of the house of the Lord 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. Six thousand were officers and 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.