Nehemiah 12:45
So they kept the charge of their God, and the charge of the purification, and so did the singers and the doorkeepers, - according to the commandment of David and of Solomon his son.
1 Chronicles 25:1-26
And David and the captains of the host set apart for service, unto the sons of Asaph and Heman and Jeduthun, such as should prophesy, with lyres, with harps, and with cymbals, - and, the number of the workers, for their service, was:
1 Chronicles 23:28
For, their duty, was - to be in attendance upon the sons of Aaron, in the laborious work of the house of Yahweh, over the courts, and over the chambers, and over the purifying of everything holy, - and doing the laborious work, of the house of God;
2 Chronicles 23:6
then let no one enter the house of Yahweh, save only the priests, and they who are in attendance of the Levites, they, may enter, for, holy, they are,-but, all the people, shall keep the watch of Yahweh.