Rev 1:4-5,17, Rev 2:8, Rev 22:12-13, Rev 1:8, Rev 21:5-6
The Old Testament says that God is the first and the last. (Isa 44:6)
Isa 44:6 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.
Jesus, who died for us and rose again, is the first and the last. (Rev 1:4-5,17, Rev 2:8, Rev 22:12-13)
Rev 1:4 John to the seven churches which are in Asia: Grace be unto you, and peace, from him which is, and which was, and which is to come; and from the seven Spirits which are before his throne; 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, 17 And when I saw him, I fell at his feet as dead. And he laid his right hand upon me, saying unto me, Fear not; I am the first and the last:
Rev 2:8 And unto the angel of the church in Smyrna write; These things saith the first and the last, which was dead, and is alive;
Rev 22:12 And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be. 13 I am Alpha and Omega, the beginning and the end, the first and the last.
God is the first and the last. (Rev 1:8, Rev 21:5)
Rev 1:8 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.
Rev 21:5 And he that sat upon the throne said, Behold, I make all things new. And he said unto me, Write: for these words are true and faithful.