'Service' in the Bible

Also we pledge ourselves to contribute yearly one third of a shekel for the service [expenses] of the house of our God:

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.

O my God, remember me concerning this and do not wipe out my loyal deeds and kindnesses which I have done for the house of my God and for its services.