Ezekiel 37:22-24

22and I will make them one nation in the land, upon the mountains of Israel; and one king shall be king to them all; and they shall be no more two nations, neither shall they be divided into two kingdoms any more at all; 23neither shall they defile themselves any more with their idols, nor with their detestable things, nor with any of their transgressions; but I will save them out of all their dwelling-places, wherein they have sinned, and will cleanse them: so shall they be my people, and I will be their God.

24And 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.