'Servant' in the Bible

Thus says the Lord Yahweh: 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.

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.

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

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

They shall dwell in the land that I have given to Jacob my servant, in which your fathers lived; and they shall dwell therein, they, and their children, and their children's children, forever: and David my servant shall be their prince for ever.