'Service Of The Lord' in the Bible
These were the sons of Levi by their ancestral houses-the heads of families, according to their registration by name in the headcount-20 years old or more, who worked in the service of the Lord's temple.
"but their duty will be to assist the sons of Aaron with the service of the Lord's temple, being responsible for the courts and the chambers, the purification of all the holy things, and the work of the service of God's temple-
They are to carry out their responsibilities to the tent of meeting, to the holy place, and to their relatives, the sons of Aaron, in the service of the Lord's temple."
[Also included were plans] for the divisions of the priests and the Levites; all the work of service in the Lord's house; all the articles of service of the Lord's house;
Then David said to his son Solomon, "Be strong and courageous, and do the work. Don't be afraid or discouraged, for the Lord God, my God, is with you. He won't leave you or forsake you until all the work for the service of the Lord's house is finished.