9:33 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.
-World English Bible
Other Translation
9:33 And these [are] the singers, chief of the fathers of the Levites, [who remaining] in the chambers [were] free: for they were employed in [that] work day and night.
-King James Version