Does Matthew 28:19-20 prove the Trinity? In Matthew 28:19-20 Jesus teaches the Trinity to go baptize in the name of the Father, the Son, and the Holy Spirit. Does Matthew 28:19-20 teach the Trinity doctrine, ie the doctrine of the Trinity? The Bible teaches in both the Old Testament and in the New Testament that the Trinity is biblical, and Jesus did teach the Trinity in Matthew 28:19-20 and in many other Scriptures in the Gospels. There is one God who have been revealed through 3 distinct persons as the Father, the Son (Jesus), and the Holy Spirit. Below are videos and articles on how to become a Christian, the Trinity is biblical, and various debates with Oneness Pentecostals, Jehovah's Witnesses, Mormons, Muslims, Hebrew Israelites, etc.