John one says that Jesus was with God in the beginning... and also
that all things were made by Him. Jesus preexisted His incarnation.
In the beginning was the Word, and the Word was with God, and the Word was God.
2 The same was in the beginning with God.
3 All things were made by him; and without him was not any thing made that was made.
More verses on Jesus being the agent of creation:
The Son is the image of the invisible God, the firstborn over all creation. 16 For in Him all things were created, things in heaven and on earth, visible and invisible, whether thrones or dominions or rulers or authorities. All things were created through Him and for Him. 17 He is before all things, and in Him all things hold together.… Col 1:15-17
Hebrews 1:2“In these last days he has spoken to us by his Son, whom he appointed heir of all things, and through whom also he made the universe.”