Revelation 1:8

I am the Alpha and the Omega, the beginning and the end, saith the Lord, who is, and who was, and who is to come, the Almighty.

Revelation 22:13

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

1 Timothy 3:16

And without controversy great is the mystery of godliness: God was manifested in the flesh, justified in the Spirit, seen by angels, preached among the Gentiles, believed on in the world, and received up into glory.

Matthew 25:34

Then will the king say to them on his right hand, Come, ye blessed of my Father, inherit the kingdom prepared for you from the foundation of the world:

Matthew 27:37

THIS IS THE KING OF THE JEWS.

Revelation 1:11

saying, I am the Alpha and the Omega, the first and the last; and, What thou seest write in a book, and send it to the seven churches in Asia, to Ephesus, and to Smyrna, and to Pergamos, and to Thyatira, and to Sardis, and to Philadelphia, and to Laodicea.

Revelation 1:17-18

And when I saw Him, I fell at his feet as dead; and He laid his right hand upon me, and said to me, "Fear not,

Revelation 2:8

And to the angel of the church in Smyrna write, These things saith the First and the Last, who was dead and is alive;

Treasury of Scripture Knowledge

Summary

Thus saith the LORD the King of Israel, and his redeemer the LORD of hosts; I am the first, and I am the last; and beside me there is no God.

Bible References

I am the first

Revelation 1:8
I am the Alpha and the Omega, the beginning and the end, saith the Lord, who is, and who was, and who is to come, the Almighty.
Revelation 2:8
And to the angel of the church in Smyrna write, These things saith the First and the Last, who was dead and is alive;
Revelation 22:13
I am the Alpha and the Omega, the beginning and the end, the first and the last.

Beside

1 Timothy 3:16
And without controversy great is the mystery of godliness: God was manifested in the flesh, justified in the Spirit, seen by angels, preached among the Gentiles, believed on in the world, and received up into glory.

General references

Hebrews 13:8
Jesus Christ is the same yesterday, to day, and for ever:
James 2:19
Thou believest that there is one God; thou dost well: the devils also believe and tremble.
Revelation 22:13
I am the Alpha and the Omega, the beginning and the end, the first and the last.