4.3 Statements of Jesus and John the Baptist
This is not an exhaustive list, just excerpts. But they are sufficient (all KJV):
"The beginning of the gospel of Jesus Christ, the Son of God" (Mark 1:1).
"Now after that John was put in prison, Jesus came into Galilee, preaching the gospel of the kingdom of God, and saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel" (Mark 1:14-15).
"And Jesus went about all Galilee, teaching in their synagogues, and preaching the gospel of the kingdom, and healing all manner of sickness and all manner of disease among the people" (Matthew 4:23).
"And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come" (Matthew 24:14).
"Verily I say unto you, Wheresoever this gospel shall be preached in the whole world, there shall also this, that this woman hath done, be told for a memorial of her" (Matthew 26:13).
"And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel" (Mark 1:15).
"And he said unto them, Go ye into all the world, and preach the gospel to every creature. He that believeth and is baptized shall be saved; but he that believeth not shall be damned" (Mark 16:15-16).
"The law and the prophets were until John: since that time the kingdom of God is preached, and every man presseth into it" (Luke 16:16).
We have faith in the reader that you can draw the proper conclusion from these scriptures. When doctrines of multiple kingdoms and multiple gospels have to be invented to explain away the obvious, the obvious becomes even more obvious.
"In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made. In him was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not. There was a man sent from God, whose name was John. The same came for a witness, to bear witness of the Light, that all men through him might believe. He was not that Light, but was sent to bear witness of that Light. That was the true Light, which lighteth every man that cometh into the world. He was in the world, and the world was made by him, and the world knew him not. He came unto his own, and his own received him not. But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name: Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God. And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth. John bare witness of him, and cried, saying, This was he of whom I spake, He that cometh after me is preferred before me: for he was before me. And of his fulness have all we received, and grace for grace. For the law was given by Moses, but grace and truth came by Jesus Christ" (John 1:1-17).
You be the judge: what part of this is the Old Testament? But do not stop here, keep on reading. Read MML&J and take note of how much is an elaboration on the OT and how much pertains to the “at hand” kingdom of God and the good news (gospel) about it. Again, you will have no problem in arriving at the right conclusion unless you seek help from false teachers.