1 Chronicles 26:30 - Joseph Benson’s Commentary on the Old and New Testaments

In all business of the Lord In all things which concerned the house or worship of God; to take care that such moneys as were given toward building the temple, or toward the sacrifices and other holy ministrations, should be gathered and received, and faithfully sent up to Jerusalem; and to see the execution of all the laws of God among the people. In the service of the king, &c. They served the king in the execution of his decrees, by which the several rights of the king and people were established. And as the king was the principal person intrusted with the execution of God's laws, so these Levites chiefly were his eyes, by which he saw his people's transgressions, and his hands, by which he inflicted due censures upon them for their miscarriages.