Isa 22:20-25
"And it shall come to pass in that day, that I will call my servant Eliakim the son of Hilkiah:And I will clothe him with thy robe, and strengthen him with thy girdle, and I will commit thy government into his hand and he shall be a father to the inhabitants of Jerusalem, and to the house of Judah. And the key of the house of David will I lay upon his shoulder; so he shall open, and none shall shut; and he shall shut, and none shall open.
Ezek 34:23-24
"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 the LORD will be their God, and my servant David a prince among them; I the LORD have spoken it. And David my servant shall be king over them; and they all shall have one shepherd: they shall also walk in my judgments, and observe my statutes, and do them."
Matt 16:18-19
"And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it. And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven."