Revelation 1:18-20

18and the one who lives! I was dead, but look, now I am alive – forever and ever – and I hold the keys of death and of Hades!

19Therefore write what you saw, what is, and what will be after these things.

20The mystery of the seven stars that you saw in my right hand and the seven golden lampstands is this: The seven stars are the angels of the seven churches and the seven lampstands are the seven churches.