Revelation 1:8

"I am the Alpha and the Omega" [Note: These are the first and last letters of the Greek alphabet, and indicate "the beginning and the end" See 21:6], says the Lord God Almighty, who is [in the present], and who was [in the past] and who will come [in the future].

Revelation 22:13

I am the Alpha and the Omega [See note at 1:8], the first and the last, the beginning and the end."

1 Timothy 3:16

And without question the revealed secret of godly living is great. [It is this]: He [i.e., Christ, or God], who appeared in a fleshly body [was] vindicated [of false charges] by the Holy Spirit; [He was] seen by angels, was preached among the nations, was believed in throughout the world [and finally] was taken up into glory [i.e., heaven].

Matthew 25:34

Then the King will say to those at His right side, 'You who are blessed by my Father, come and receive the kingdom which has been prepared for you since the creation of the world,

Matthew 27:37

They attached over His head [i.e., to the upright portion of the cross] the charge made against Him, which read, "This is Jesus, the king of the Jews."

Revelation 1:11

saying, "Write down in a book what you see and send it to the seven churches: Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia and Laodicia" [Note: These seven congregations were all located in western Asia Minor].

Revelation 1:17-18

And when I saw Him, I fell at His feet as [though I were] dead. And He placed His right hand on me and said, "Do not be afraid; I am the First and the Last,

Revelation 2:8

"And write [this] to the angel of the church at Smyrna: These things are the words of the First and the Last [i.e., Jesus], who was dead, but has come [back] to life:

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" [Note: These are the first and last letters of the Greek alphabet, and indicate "the beginning and the end" See 21:6], says the Lord God Almighty, who is [in the present], and who was [in the past] and who will come [in the future].
Revelation 2:8
"And write [this] to the angel of the church at Smyrna: These things are the words of the First and the Last [i.e., Jesus], who was dead, but has come [back] to life:
Revelation 22:13
I am the Alpha and the Omega [See note at 1:8], the first and the last, the beginning and the end."

Beside

1 Timothy 3:16
And without question the revealed secret of godly living is great. [It is this]: He [i.e., Christ, or God], who appeared in a fleshly body [was] vindicated [of false charges] by the Holy Spirit; [He was] seen by angels, was preached among the nations, was believed in throughout the world [and finally] was taken up into glory [i.e., heaven].

General references

Hebrews 13:8
Jesus Christ is the same yesterday and today and forever.
James 2:19
You believe that there is [only] one God; that is good! Even the demons believe [that], and they shudder [with fear at the thought].
Revelation 22:13
I am the Alpha and the Omega [See note at 1:8], the first and the last, the beginning and the end."