'Service' in the Bible

And they set the priests in their divisions, and the Levites in their courses, for the service of God, which is at Jerusalem; as it is written in the book of Moses.

The vessels also that are given thee for the service of the house of thy God, those deliver thou before the God of Jerusalem.

Also of the Nethinims, whom David and the princes had appointed for the service of the Levites, two hundred and twenty Nethinims: all of them were expressed by name.