And these are the singers, heads of fathers of the Levites, [who dwelt] in the chambers [and were] free [from other service], for they were employed in their work day and night.
and Mattaniah the son of Mica, the son of Zabdi, the son of Asaph, who was the chief to begin the thanksgiving in prayer, and Bakbukiah, the second among his brothers, and Abda the son of Shammua, the son of Galal, the son of Jedut
Also we certify to you, that concerning any of the priests and Levites, the singers, porters, Nethinim, or servants of this house of God, it shall not be lawful to impose tribute, custom, or toll, upon them.