Romans 1:16-17; 16:26
Two Kinds of Obedience.
Points of Agreement & Disagreement.
Divine Examples Illustrating Obedience of Faith in the Old Testament.
Divine Examples Illustrating Obedience of Faith in the New Testament.

For more on the sin-offerings of priests under the Old Law, you might like to consult an article I found at:
https://www.gotquestions.org/sin-offering.html