Revelation 1:7-8

7 Look! He comes with the clouds of heaven. And everyone will see him— even those who pierced him. And all the nations of the world will mourn for him. Yes! Amen!
8 “I am the Alpha and the Omega—the beginning and the end,” says the Lord God. “I am the one who is, who always was, and who is still to come—the Almighty One.”