'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 hallowed in them in the sight of the nations, then shall they dwell in their land which I have given 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 a prince in their midst: I Jehovah have spoken it.

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

And they shall dwell in the land that I have given unto Jacob my servant, wherein your fathers have 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.