John 17:5 - Matthew Poole's English Annotations on the Holy Bible

Let the glory which, as to my Divine nature, I had with thee before the foundation of the world, be communicated also to my human nature, that my whole person may be made glorious. From hence is easily concluded, against those who deny the Godhead of Christ, that Christ was glorified with his Father before the world was, which he could not have been if he had not been eternal God. He here begs of his Father, that that glory might shine upon his person as Mediator.