Chronicles I 9:33

33 And these the singers, heads of families of the Levites, established daily courses, for they were employed in the services day and night.

Chronicles I 9:33 Meaning and Commentary

1 Chronicles 9:33

And these are the singers, chief of the fathers of the
Levites
Others of them were employed in singing, and were masters of the song, and presided in that service, see ( 1 Chronicles 6:31 ) who remaining

in the chambers were free;
from all other work and service; and there they abode, even in the chambers of the temple, that they might be near to perform their work, and not be defiled, and made unfit for it:

for they were employed in that work day and night;
some or other of them, either in composing or singing psalms and hymns, or teaching others how to sing them.

Chronicles I 9:33 In-Context

31 And Matthathias of the Levites, (he the first-born of Salom the Corite,) in charge over the sacrifices of meat-offering of the pan belonging to the high priest.

32 And Banaias the Caathite, from among their brethren, over the shewbread, to prepare it every sabbath.

33 And these the singers, heads of families of the Levites, established daily courses, for they were employed in the services day and night.

34 These the heads of the families of the Levites according to their generations; these chiefs dwelt in Jerusalem.

35 And Jeel the father of Gabaon dwelt in Gabaon; and his wife's name Moocha.