Revelation 1:18-20

18and the living one. I died, and behold I am alive forevermore, and I have the keys of Death and Hades.

19Write therefore the things that you have seen, those that are and those that are to take place after this.

20As for the mystery of the seven stars that you saw in my right hand, and the seven golden lampstands, the seven stars are the angels of the seven churches, and the seven lampstands are the seven churches.