27 They stayed around God’s house, because that duty was on them; and to their duty was its opening morning by morning.
1 Chronicles 9:27 Cross References - WEB
1 Samuel 3:15
15 Samuel lay until the morning, and opened the doors of Yahweh’s house. Samuel was afraid to show Eli the vision.
1 Chronicles 23:30-32
30 and to stand every morning to thank and praise Yahweh, and likewise in the evening;
31 and to offer all burnt offerings to Yahweh, on the Sabbaths, on the new moons, and on the set feasts, in number according to the ordinance concerning them, continually before Yahweh;
32 and that they should keep the duty of the Tent of Meeting, the duty of the holy place, and the duty of the sons of Aaron their brothers, for the service of Yahweh’s house.
Malachi 1:10
10 “Oh that there were one among you who would shut the doors, that you might not kindle fire on my altar in vain! I have no pleasure in you,” says Yahweh of Armies, “neither will I accept an offering at your hand.
Romans 12:7
7 or service, let’s give ourselves to service; or he who teaches, to his teaching;