1 Chronicles 23:24-28

23:24 These were the descendants of Levi according to their families, that is, the leaders of families as counted and individually listed who carried out assigned tasks in the Lord’s temple and were twenty years old and up. 23:25 For David said, “The Lord God of Israel has given his people rest and has permanently settled in Jerusalem. 23:26 So the Levites no longer need to carry the tabernacle or any of the items used in its service.” 23:27 According to David’s final instructions, the Levites twenty years old and up were counted.

23:28 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.