Baptism
According to Galatians 3:26-27, Baptism is essential for salvation since salvation is in Christ and, the scripture tells us that Baptism puts us into Christ.
In accordance to the apostles doctrine Acts 2:38, sinners are to be baptized for the forgiveness of their sins in order to receive the Holy Spirit.
That is what was told on the day of Pentecost to the people when they asked what they needed to do to be saved.
