These are the singers, heads of the fathers' houses of the Levites, who lodged in the chambers, and were free from other duties; for they were employed in that work day and night.
1 Chronicles 9:33
Surrounding context
9:32 And some of their brethren of the sons of the Kohathites were in charge of preparing the showbread for every Sabbath.
9:33 These are the singers, heads of the fathers' houses of the Levites, who lodged in the chambers, and were free from other duties; for they were employed in that work day and night.
9:34 These heads of the fathers' houses of the Levites were heads throughout their generations. They dwelt at Jerusalem.