A title of Christ
I am Alpha and Omega, the beginning and the ending, saith the Lord, which is, and which was, and which is to come, the Almighty. (Revelation 1:8)
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. (Revelation 1:11)
And he said unto me, It is done. I am Alpha and Omega, the beginning and the end. I will give unto him that is athirst of the fountain of the water of life freely. (Revelation 21:6)
I am Alpha and Omega, the beginning and the end, the first and the last. (Revelation 22:13)
Compare
Who hath wrought and done it, calling the generations from the beginning? I the Lord, the first, and with the last; I am he. (Isaiah 41:4)
Thus saith the Lord the King of Israel, and his redeemer the Lord of hosts; I am the first, and I am the last; and beside me there is no God. (Isaiah 44:6)
Hearken unto me, O Jacob and Israel, my called; I am he; I am the first, I also am the last. (Isaiah 48:12)