“Then said they unto him, Who art thou? And Jesus saith unto them, Even the same that I said unto you from the beginning.”
King James Version (KJV)
8:25 Even what I say to you from the beginning - The same which I say to you, as it were in one discourse, with one even tenor from the time I first spake to you.
Joh 8:25 Who art thou? No doubt asked with a sneer; hence, he only refers them to his past words.