The early Christians relied on tradition and Magisterium

During the time of Jesus and the early Christians, public revelation was still occurring, and some of these revelations were recorded in Scripture. However, even if a revelation was not immediately recorded, its message held authority. This demonstrates that the early Christians did not adhere to solo-scriptura. They relied on the transmission of oral tradition, passed down before being written in Scripture. Additionally, they believed in a divinely appointed teaching authority called the Magisterium, which began with Jesus and was entrusted to the Church. This authority not only interpreted prior revelation authoritatively but guided the leaders of the early Church in making authoritative pronouncements. Hence, the early Church employed Scripture, tradition, and the Magisterium in their teachings.