Revelation 1:8
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 22:13
I am Alpha and Omega, the beginning and the end, the first and the last.

Revelation 1:11
Saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send 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 21:6
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.