Parallel
1 Chronicles 9:33
Brenton's English Septuagint · Berean Standard Bible
And these [were] the singers, heads of families of the Levites, [to whom were] established daily courses, for they were employed in the services day and night.
Those who were musicians, the heads of Levite families, stayed in the temple chambers and were exempt from other duties because they were on duty day and night.