Revelation 1:2

1:2 who then testified to everything that he saw concerning the word of God and the testimony about Jesus Christ.

Revelation 1:8

1:8 “I am the Alpha and the Omega,” says the Lord God – the one who is, and who was, and who is still to come – the All-Powerful!

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.”