Revelation 1:10-11

Revelation 1:10: “I" [John] "was in the Spirit on the Lord's day, and heard behind me a great voice, as of a trumpet,” The angel of Christ, sent to speak his words.

Revelation 1:11:
“Saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send it unto the seven churches which are in Asia; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea.”