2 Chronicles 13:10

and the priests, which minister unto the Lord, are the sons of Aaron R.V. and we have priests ministering unto the LORD, the sons of Aaron.

wait upontheir business R.V. in their work (sc. ministering to the Lordas above). Part of the ideal of the Priestly Code was that the Levites should be restricted to the duty of helping the priests, and should be prevented from executing priestly functions themselves. With this ideal the Chronicler plainly sympathised, but it could not always be realised.