'Service of God' in the Bible

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

who are Israelites; to whom belong the adoption, and the glory, and the covenants, and the giving of the Law, and the service of God, and the promises;

Now when these things were ordained in this way, the priests always went into the first tabernacle, accomplishing the service of God.