Verse 33. These - Others of the Levites; of whose several offices he had spoken before. Are - Or rather, were; which is understood, all along in the foregoing and following verses. Chambers - That they might be ready to come whensoever they were called to the service of God in the tabernacle. Free - From all trouble and employment, that they might wholly attend upon the proper work. That work - Either composing or ordering sacred songs; or actually singing; or teaching others to sing them. Day and night - Continually, and particularly in the morning and evening, the two times appointed for solemn service. Thus was God continually praised, as it is fit he should be, who is continually doing us good.
Verse 34. Jerusalem - Upon their return from Babylon they were not suffered to chuse their habitations in the country, as others were, but were obliged to settle themselves at Jerusalem, that they might constantly attend upon God's service there.
Verse 35. Maachah - In this and the following verses, he repeats Saul's genealogy, that he might make way for the following history.