Revelation 3:7
And to the angel of the church of Philadelphia write, These things saith the Holy, the True One, he that hath the key of David, he that openeth, and none shutteth, and shutteth and none openeth.
Matthew 16:18-19
And I say also to thee, Thou art Peter, and on this rock I will build my church, and the gates of hell shall not prevail against it.
Matthew 18:18-19
Verily I say to you, Whatsoever ye shall bind on earth, shall be bound in heaven, and whatsoever ye shall loose on earth, shall be loosed in heaven.
Revelation 1:18
And he that liveth and was dead, and behold I am alive for evermore, and have the keys of death and of Hades.