Revelation 1:8

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

Revelation 1:17

And when I saw him, I fell down at his feet, as dead; and he laid his right hand upon me, and said, Fear not; I am the First and the Last;

Revelation 1:11

saying, What you see, write in a book, and send it to the seven congregations; to Ephesus, and to Smyrna, and to Pergamos, and to Thyatira, and to Sardis, and to Philadelphia, and to Laodicea.

Revelation 2:8

And by the messenger of the congregation in Smyrna, write: These things, says the First and the Last, who was dead, and is alive:

Treasury of Scripture Knowledge

Summary

And he is before all things, and by him all things consist.

Bible References

He

Revelation 1:8
I am the Alpha and the Omega, says the Lord, who is, and who was, and who is to come, the Almighty.
Revelation 2:8
And by the messenger of the congregation in Smyrna, write: These things, says the First and the Last, who was dead, and is alive: