Revelation 1:8; Revelation 21:6; Revelation 22:13

8 "I am the Alpha and the Omega," says the Lord God, "who is and who was and who is to come, the Almighty."

6 Then He said to me, "It is done. I am the Alpha and the Omega, the beginning and the end. I will give to the one who thirsts from the spring of the water of life without cost.

13 "I am the Alpha and the Omega, the first and the last, the beginning and the end."