The Trinitarian formula was introduced by Constantine the Great. It was he who determined that the Holy Spirit was a third person, and not a name title for Yahwah.
Catholic Cardinal Joseph Ratzinger: THE 1968 EDITION, Introduction to Christianity: By Joseph Ratzinger. page 82-83.
He makes this confession as to the origin of the chief Trinity text of Matthew 28:19. "The basic form of our (Matthew 28:19 Trinitarian) profession of faith took shape during the course of the second and third centuries in connection with the ceremony of baptism. So far as its place of origin is concerned, the text (Matthew 28:19) came from the city of Rome."
The Trinity baptism and text of Matthew 28:19 therefore did not originate from the original Church that started in Jerusalem around AD 33. It was rather as the evidence proves a later invention of Roman Catholicism completely fabricated. Very few know about these historical facts.
"The Demonstratio Evangelica" by Eusebius: Eusebius of Caesarea. 265 ? AD.– 337 ? AD.
Eusebius was the Church historian and Bishop of Caesarea. On page 152 Eusebius quotes the early book of Matthew that he had in his library in Caesarea. According to that eyewitness of an unaltered Book of Matthew that could have been the original book or the first copy of the original of Matthew. Eusebius informs us of Jesus' actual words to his disciples in the original text of Matthew 28:19: "With one word and voice He said to His disciples: "Go, and make disciples of all nations in My Name, teaching them to observe all
things whatsoever I have commanded you." That "Name" is Jesus.
Matthew 28:19. N.I.V.
Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit.
Eusebius was the Bishop of Caesarea and is known as “the Father of Church History.” Eusebius quotes many verses in his writings, and Matthew 28:19 is one of them. He never quotes it as it is today in our modern Bibles, but he always finishes the verse with the words “in my name.” For example, in Book III of his History, Chapter 5, Section 2, which is about the Jewish persecution of early Christians, we read:
But the rest of the apostles, who had been incessantly plotted against with a view to their destruction, and had been driven out of the land of Judea, went to all nations to preach the Gospel, relying upon the power of Christ, who had said to them, “Go ye and make disciples of all the nations in my name.”
And again, in his Oration in Praise of Emperor Constantine, Chapter 16, Section 8, we read:
What king or prince in any age of the world, what philosopher, legislator or prophet, in civilized or barbarous lands, has attained so great a height of excellence, I say not after death, but while living still, and full of mighty power, as to fill the ears and tongues of all mankind with the praises of his name? Surely none save our only Savior has done this, when, after his victory over death, he spoke these words to his followers, and fulfilled it by that event, saying to them, “Go ye and make disciples of all nations in my name.”
There is not a single occurrence of the disciples baptizing anyone using the Trinitarian formula. All of the scripture in the New Testament shows that people were baptized into the name of Jesus, even after Pentecost.
And when people in church leadership received the Holy Spirit, it was without the Trinitarian formula as in Acts 8:17.
Then Peter and John placed their hands on them, and they received the Holy Spirit.