Romans 15:16 describes Paul's priestly ministry to the Gentiles — directly expanding his role stated in Romans 11:13.

In Romans 1:1, Paul introduces himself as called to be an apostle — the same calling he magnifies here for the Gentiles.

Romans 3:29 affirms God is God of Gentiles also — the theological basis for Paul's apostolic mission to them.

In Acts 9:15, Jesus declares Paul a chosen instrument to bear His name before Gentiles, directly establishing the apostleship Paul claims here.

In Acts 13:2, the Holy Spirit sets apart Paul (and Barnabas) for the work—the specific Gentile mission later described here.

In Acts 22:21, Paul recounts Jesus personally commissioning him to go far away to the Gentiles, confirming his role.

In Acts 26:17, Jesus tells Paul he is being sent to the Gentiles, reinforcing the divine origin of his apostleship.

In Acts 26:18, the purpose of Paul's Gentile mission is to open their eyes and turn them from darkness to light.

In Galatians 1:16, Paul says God revealed His Son in him so that he might preach Him among the Gentiles.

In Galatians 2:7-9, the Jerusalem apostles acknowledge Paul's mission to the Gentiles, giving him the right hand of fellowship.

In Ephesians 3:8, Paul describes being given grace to preach to the Gentiles the unsearchable riches of Christ.

In 1 Timothy 2:7, Paul declares he was appointed a herald and apostle—to the Gentiles in faith and truth.

In 2 Timothy 1:11, Paul states he was appointed a preacher, apostle, and teacher — reinforcing his divine calling as an apostle.

In 2 Corinthians 11:28, Paul describes his daily anxiety for all churches — showing the burden behind his magnified ministry.