'Serve' in the Bible

You have appointed them as a kingdom and priests to serve our God, and they will reign on the earth."

Therefore are they before the throne of God, and serve him day and night in his temple: and he that sitteth on the throne shall dwell among them.

Then a reed was given me to serve as a measuring rod; and a voice said, "Rise, and measure God's sanctuary--and the altar--and count the worshipers who are in it.

A voice came from the throne, saying, "Praise our God, all who serve and fear him, from the least important to the most important."

And there shall be no more curse: but the throne of God and of the Lamb shall be in it; and his servants shall serve him: