NET

28 Their job was to help Aaron’s descendants in the service of the Lord’s temple. They were to take care of the courtyards, the rooms, ceremonial purification of all holy items, and other jobs related to the service of God’s temple.

Darby

28 For their place was by the side of^D2455 the sons of Aaron for the service of the house of Jehovah, over the courts, and over the chambers, and over the purifying of all holy things, and [for] the work of the service of the house of God;

Darby Bible Notes

of - Or 'at the hand of.'

KJV

28 Because their office [was] to wait on the sons of Aaron for the service of the house of the LORD, in the courts, and in the chambers, and in the purifying of all holy things, and the work of the service of the house of God;

KJV Bible Notes

their office was to wait on the sons of Aaron: Heb. their station was at the hand of the sons of Aaron.

Strong's

28 Because their office^H4612 was to wait^H3027 on the sons^H1121 of Aaron^H175 for the service^H5656 of the house^H1004 of the LORD^H3068, in the courts^H2691, and in the chambers^H3957, and in the purifying^H2893 of all holy things^H6944, and the work^H4639 of the service^H5656 of the house^H1004 of God^H430;