2 Corinthians 11:5
For I suppose I was not a whit behind the very chiefest apostles.
Cross-reference
In 2 Corinthians 11:23, Paul lists his sufferings to prove he is not inferior — direct continuation of his argument.
In 2 Corinthians 12:11, Paul repeats the same claim of not being inferior to these super-apostles, reinforcing his defense.
2 Corinthians 12:12 provides the evidence—signs and wonders—that validates Paul's claim of not being inferior.
In Galatians 2:6-9, Paul asserts equality with the Jerusalem apostles, directly paralleling his claim of not being inferior.
Job 12:3 has Job saying 'I am not inferior to you,' a direct verbal parallel to Paul's claim.
Job 13:2 repeats the same assertion of not being inferior, strengthening the verbal parallel.
In 1 Corinthians 9:1, Paul defends his apostleship with rhetorical questions — same theme of apostolic credentials.
In 1 Corinthians 15:9, Paul calls himself least of apostles — contrasting with his claim here of not being inferior.
In Galatians 2:8, Paul parallels his apostolic work to Peter's — reinforcing his equal standing.
1 Corinthians 15:10 shows Paul's apostolic labor is by grace, complementing his boast—he is not inferior, but it's God's grace.