Revelation 1:4

1:4 From John, to the seven churches that are in the province of Asia: Grace and peace to you from “he who is,” and who was, and who is still to come, and from the seven spirits who are before his throne,

Revelation 1:20

1:20 The 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.