I Crônicas 9:33

33 Those who were musicians, heads of Levite families, stayed in the rooms of the temple and were exempt from other duties because they were responsible for the work day and night.

33 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.