Parallel
1 Chronicles 9:33
Swete's Septuagint · Berean Standard Bible
καὶ οὗτοι ψαλτῳδοί, ἄρχοντες τῶν πατριῶν τῶν Λευειτῶν, διατεταγμέναι ἐφημερίαι· ὅτι ἡμέρα καὶ νὺξ ἐπʼ αὐτοῖς ἐν τοῖς ἔργοις.
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.