1 Esdras 1:4–5

and said, Ye shall no more have need to bear it upon your shoulders: now therefore serve the Lord your God, and minister unto his people Israel, and prepare you after your fathers’ houses and kindreds, according to the writing of David king of Israel, and according to the magnificence of Solomon his son: and standing in the holy place according to the several divisions of the families of you the Levites, who minister in the presence of your brethren the children of Israel,