1 Peter 1, the entire chapter is a very good reference. Even mentions born-again and the spotless lamb and the blood of Christ. Please start there. As with 1 John 1 also addresses the blood of Jesus Christ cleanses us from all sin.
I also mentioned in my last post that Philip preached from Isaiah 53 with the Ethiopian eunuch. The Suffering Servant.
Peter teaching.
1 Peter 1:22 Seeing ye have purified your souls in obeying the truth
Paul teaching.
Hebrews 10:10 By the which will we are sanctified through the offering of the body of Jesus Christ once for all. 11 And every priest standeth daily ministering and offering oftentimes the same sacrifices, which can never take away sins: 12 But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God; 13 From henceforth expecting till his enemies be made his footstool. 14 For by one offering he hath perfected for ever them that are sanctified. 1 Corinthians 6:11 And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God.
Rom. 4:5, "But to the one who does not work, but believes in Him who justifies the ungodly, his faith is reckoned as righteousness,"
Rom. 5:1, "therefore having been justified by faith, we have peace with God through our Lord Jesus Christ,"
Romans 9:30 What shall we say then? That the Gentiles, which followed not after righteousness, have attained to righteousness, even the righteousness which is of faith. 31 But Israel, which followed after the law of righteousness, hath not attained to the law of righteousness. 32 Wherefore? Because they sought it not by faith, but as it were by the works of the law. For they stumbled at that stumblingstone;
Do you notice any difference?