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 1:11

1:11 saying: “Write in a book what you see and send it to the seven churches – to Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia, and Laodicea.”

Revelation 7:14

7:14 So I said to him, “My lord, you know the answer.” Then he said to me, “These are the ones who have come out of the great tribulation. They have washed their robes and made them white in the blood of the Lamb!

Revelation 17:1

The Great Prostitute and the Beast

17:1 Then one of the seven angels who had the seven bowls came and spoke to me. “Come,” he said, “I will show you the condemnation and punishment of the great prostitute who sits on many waters,