Augustine of Hippo
Catena Aurea · Johannesevangelium 3
He that cometh from above is above all: he that is of the earth is earthly, and speaketh of the earth: he that cometh from heaven is above all. And what he hath seen and heard, that he testifieth; He that is of the earth is of the earth; i. e. is earthly, and speaketh of the earth, speaketh earthly things.
(Tr. xiv. c. 7) But what is it, which the Son hath heard from the Father? Hath He heard the word of the Father? Yea, but He is the Word of the Father. When thou conceivest a word, wherewith to name a thing, the very conception of that thing in the mind is a word. Just then as thou hast in thy mind and with thee thy spoken word; even so God uttered the Word, i. e. begat the Son. Since then the Son is the Word of God, and the Son hath spoken the Word of God to us, He hath spoken to us the Father’s word. What John said is therefore true.