They served by making music at the Holy Tent (also called the Meeting Tent), and they served until Solomon built the Temple of the Lord in Jerusalem. They followed the rules for their work.
Some of the Levites were musicians in the Temple. The leaders of these families stayed in the rooms of the Temple. Since they were on duty day and night, they did not do other work in the Temple.
King Hezekiah appointed groups of priests and Levites for their special duties. They were to offer burnt offerings and fellowship offerings, to worship, and to give thanks and praise at the gates of the Lord’s house.
The Levite singers from Asaph’s family stood in the places chosen for them by King David, Asaph, Heman, and Jeduthun, the king’s seer. The gatekeepers at each gate did not have to leave their places, because their fellow Levites had prepared everything for them for the Passover.
Then they put the priests and the Levites into their separate groups. Each group had a certain time to serve God in the Temple at Jerusalem as it is written in the Book of Moses.
There were two rooms in the inner courtyard. One was beside the north gateway and faced south. The other room was beside the south gateway and faced north.