These are the singers, heads of the fathers' houses of the Levites, dwelling in the temple chambers, free from other service because they were on duty day and night.
And all Israel in the days of Zerubbabel and [later] of Nehemiah gave the daily portions for the singers and the gatekeepers; and they set apart what was for the Levites, and the Levites set apart what was for the sons of Aaron [the priests].