2 Corinthians 8:22
And we have sent with them our brother, whom we have oftentimes proved diligent in many things, but now much more diligent, upon the great confidence which I have in you.
Cross-reference
2 Corinthians 8:18
Historical context
In 2 Corinthians 8:18, another brother is commended as famous among churches — both are part of Paul's delegation for the collection.
Philippians 2:20–22
Parallel
In Philippians 2:20-22, Paul commends Timothy's proven character — the same pattern of endorsing a trustworthy coworker used for the brother sent with the offering.
Philippians 2:22
Related theme
In Philippians 2:22, Timothy's proven worth is highlighted — the same idea of being tested and found earnest as this brother.
Philippians 2:25
Parallel
In Philippians 2:25, Paul sends Epaphroditus with a commendation — a parallel act of sending a trusted brother.