Here are 7 Bible verses about God existing before time from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
John 17:24 KJV
Father, I will that they also, whom thou hast given me, be with me where I am; that they may behold my glory, which thou hast given me: for thou lovedst me before the foundation of the world.
John 17:5 KJV
And now, O Father, glorify thou me with thine own self with the glory which I had with thee before the world was.
1 Peter 1:20 KJV
Who verily was foreordained before the foundation of the world, but was manifest in these last times for you,
Psalms 90:2 KJV
Before the mountains were brought forth, or ever thou hadst formed the earth and the world, even from everlasting to everlasting, thou art God.
Ephesians 1:4 KJV
According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love:
2 Timothy 1:9 KJV
Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began,
Proverbs 8:23 KJV
I was set up from everlasting, from the beginning, or ever the earth was.