And these are the singers, heads of fathers' houses of the Levites, who dwelt in the chambers and were free from other service: for they were employed in their work day and night.
Moreover Hezekiah the king and the princes commanded the Levites to sing praises unto the LORD with the words of David, and of Asaph the seer. And they sang praises with gladness, and they bowed their heads and worshipped.
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 brethren; and Abda the son of Shammua, the son of Galal, the son of Jeduthun.