Nehemiah 12:45

And they performed the worship of their God and the service of purification; so did the singers and gatekeepers, as David and his son Solomon had commanded.

1 Chronicles 25:1-26

Moreover, David and the commanders of the army selected for the [temple] service some of the sons of Asaph, Heman, and Jeduthun, who were to prophesy with lyres, harps, and cymbals. The list of the musicians who performed their service was as follows:

1 Chronicles 23:28

For their duty is to assist [the priests] the sons of Aaron in the service of the house of the Lord, in [caring for] the courtyards, the chambers, the purifying of all holy things, and any work of the service of the house of God,

2 Chronicles 23:6

But let no one enter the house (temple) of the Lord except the priests and the Levites who minister; they may enter, for they are holy. And let all the people carefully observe the law of the Lord.

Treasury of Scripture Knowledge

Summary

Nehemiah 12:45

And both the singers and the porters kept the ward of their God, and the ward of the purification, according to the commandment of David, and of Solomon his son.

The ward

1 Chronicles 23:28

2 Chronicles 23:6

Bible References

The ward

But let no one enter the house (temple) of the Lord except the priests and the Levites who minister; they may enter, for they are holy. And let all the people carefully observe the law of the Lord.