Revelation 1:8,11
I am Alpha and Omega, the beginning and the ending, said the Lord, which is, and which was, and which is to come, the Almighty.
Nave's Topical Index—AKJV

Revelation 21:6
And he said to me, It is done. I am Alpha and Omega, the beginning and the end. I will give to him that is thirsty of the fountain of the water of life freely.
Nave's Topical Index—AKJV

Revelation 22:13
I am Alpha and Omega, the beginning and the end, the first and the last.
Nave's Topical Index—AKJV