Revelation 1:18-20

18I am he that liveth, and was dead; and, behold, I am alive for evermore, Amen; and have the keys of hell and of death.

19Write the things which thou hast seen, and the things which are, and the things which shall be hereafter;

20The mystery of the seven stars which thou sawest in my right hand, and the seven golden lampstands. The seven stars are the angels of the seven Assemblies: and the seven lampstands which thou sawest are the seven Assemblies.