'Work of the Lord' in the Bible

But as for us, the Lord is our God, and we have not been turned away from him; we have priests who do the work of the Lord, even the sons of Aaron and the Levites in their places;

And there was a great amount of burned offerings, with the fat of the peace-offerings and the drink offerings for every burned offering. So the work of the Lord's house was put in order.

And they gave it to the overseers of the work of the Lord's house, and the overseers gave it to the workmen working in the house, for building it up and making good what was damaged;