Rev 1:5-8
5 And from Jesus Christ, Who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto Him That loved us, and washed us from our sins in His own blood,
6 And hath made us kings and priests unto God and His Father; to Him be glory and dominion for ever and ever. Amen.
7 Behold, He cometh with clouds; and every eye shall see Him, and they also which pierced Him: and all kindreds of the earth shall wail because of Him. Even so, Amen.
What Jesus said about Himself...
8 I am Alpha and Omega, the beginning and the ending, saith the Lord, Which is, and Which was, and Which is to come, the Almighty.
KJV
Jesus speaking to the blind Pharisees...
John 8:56-58
56 Your father Abraham rejoiced to see My day: and he saw it, and was glad.
57 Then said the Jews unto Him, "Thou art not yet fifty years old, and hast Thou seen Abraham?"
58 Jesus said unto them, "Verily, verily, I say unto you, Before Abraham was, I am."
KJV