1 Chronicles 9:27

and lay all night round about the house of God: because the keeping thereof pertained to them and to open it every morning.

1 Samuel 3:15

And Samuel lay till morning and then opened the doors of the house of the LORD. But Samuel feared to show Eli the vision.

1 Chronicles 23:30-32

and to wait every morning to thank and praise the LORD, and likewise at evening.

Malachi 1:10

Yea, what is he among you, that will do so much as to shut the doors, or to kindle the fire upon mine altar for naught? I have no pleasure in you, sayeth the LORD of Hosts: and as for the meat offering, I will not accept it at your hand.

Romans 12:7

Let him that hath an office, wait on his office;

Treasury of Scripture Knowledge

Summary

And they lodged round about the house of God, because the charge was upon them, and the opening thereof every morning pertained to them.

Bible References

The charge

1 Chronicles 23:32
And that they should wait on the tabernacle of witness and on the holy place, and on the sons of Aaron their brethren, in the service of the house of the LORD.
Romans 12:7
Let him that hath an office, wait on his office;

The opening

1 Samuel 3:15
And Samuel lay till morning and then opened the doors of the house of the LORD. But Samuel feared to show Eli the vision.
Malachi 1:10
Yea, what is he among you, that will do so much as to shut the doors, or to kindle the fire upon mine altar for naught? I have no pleasure in you, sayeth the LORD of Hosts: and as for the meat offering, I will not accept it at your hand.