Jesus is the Word made flesh who did speak words the words of God, which are spirit and life.
You can establish a chain
Jesus said,
John 8:28 Then said Jesus unto them, When ye have lifted up the Son of man, then shall ye know that I am he,
and that I do nothing of myself; but as my Father hath taught me (Exod 4:15), I speak these things.
As here
Deut 18:18 I will raise them up a Prophet from among their brethren, like unto thee,
and will put my words in his mouth; and he shall speak unto them all that I shall command him.
As Jesus confirms
John 12:49 For I have not spoken of myself; but the Father which sent me, he gave me a commandment,
what I should say, and what I should speak.
Nest verse in Deut
Deut 18:19 And it shall come to pass, that whosoever will not hearken unto my words which he shall speak in my name, I will require it of him.
The word Jesus had spoken would be required of whoever will not hearken unto them as Jesus confirms
John 12:48 He that rejecteth me, and receiveth not my words, hath one that judgeth him: the word that I have spoken, the same shall judge him in the last day.
So the word that Jesus (who is the Word made flesh) has spoken.
Hebrews 3:5 And Moses verily was faithful in all his house, as a servant, for a testimony of those things which were to be spoken after.
John 5:46 For had ye believed Moses, ye would have believed me: for he wrote of me.
He then gives these the words that were given him of the Father
John 17:8 For I have given unto them the words which thou gavest me; and they have received them, and have known surely that I came out from thee, and they have believed that thou didst send me.
John 17:9 I pray for them: I pray not for the world, but for them which thou hast given me; for they are thine.
And he prayed also for those who would receive the word of God by these
John 17:20 Neither pray I for these alone, but for them also which shall believe on me through their word
And the word of God is being received as it should be by such as these
1 Thes 2:12 For this cause also thank we God without ceasing, because, when ye received the word of God which ye heard of us, ye received it not as the word of men, but as it is in truth, the word of God,
which effectually worketh also in you that believe.
Jesus speaks of me AND my words, and that his words were not even his, that His doctrine was not his but the one who sent him, which was the Father's.