'Servant' in the Bible

Thus saith the Lord Jehovah: When I shall have gathered the house of Israel from the peoples among whom they are scattered, and shall be sanctified in them in the sight of the nations, then shall they dwell in their own land which I gave to my servant Jacob.

And I will set up one shepherd over them, and he shall feed them, even my servant David; he shall feed them, and he shall be their shepherd.

And I, Jehovah, will be their God, and my servant David prince among them; I, Jehovah, have spoken it.

And my servant David shall be king over them; and they all shall have one shepherd: they shall also walk in mine ordinances, and observe my statutes, and do them.

And they shall dwell in the land that I have given unto Jacob my servant, wherein your fathers dwelt; and they shall dwell therein, they, and their children, and their children's children, for ever: and David my servant shall be their prince for ever.