The Salvation of Jesus Christ
The gospel of our Lord Jesus Christ has been presented in many versions. We thank God for that but, there is only one way which the Father wants it to be demonstrated. The apostle Paul said that we should compare spiritual things with spiritual things.
Hence the most logical thing for us to be sure when we are preaching the everlasting gospel or is the true gospel of our Lord Jesus we need to have both the Old Testament and the New Testament bearing witness to our tenets.
The Teaching is Based on Leviticus Chapter 14
It would be good for you to start by reading the whole of the Leviticus chapter 14. For the whole chapter speaks of the doctrine of justification, sanctification, anointing and glorification.