1 Chronicles 9:27
They spent the night around the house of God, for the [night] watch was theirs, and they were in charge of opening the house morning after morning.
1 Samuel 3:15
So Samuel lay down until morning. Then he opened the doors of the Lord’s house. But Samuel was afraid to tell the vision to Eli.
1 Chronicles 23:30-32
They are to stand every morning to thank and praise the Lord, and likewise at evening,
Malachi 1:10
“Oh, that there were even one among you [whose duty it is to minister to Me] who would shut the gates, so that you would not kindle fire on My altar uselessly [with an empty, worthless pretense]! I am not pleased with you,” says the Lord of hosts, “nor will I accept an offering from your hand.
Romans 12:7
if service, in the act of serving; or he who teaches, in the act of teaching;