These are the singers, heads of fathers' [houses] of the Levites, [who lived] in the chambers [and were] free [from other service]; for they were employed in their work day and night.
Also we inform you, that touching any of the Kohanim and Levites, the singers, porters, temple servants 1, or servants of this house of God, it shall not be lawful to impose tribute, custom, or toll, on them.
and Mattanyah the son of Mikha, the son of Zavdi, the son of Asaf, who was the chief to begin the thanksgiving in prayer, and Bakbukyah, the second among his brothers; and `Avda the son of Shammua, the son of Galal, the son of Yedutun.