In 2 Corinthians 10:13, Paul introduces the 'measure' of his apostolic assignment — here he applies it to not boasting in others' work.

Romans 15:20 states Paul's policy to preach where Christ is not named — the very principle that keeps him from boasting in others' labors here.

1 Corinthians 3:6 describes Paul planting the Corinthian church — the very labor he claims here as his own, not another's.

1 Corinthians 3:10 shows Paul laying the foundation at Corinth — exactly the work he refers to here as his own apostolic assignment.

1 Corinthians 4:6 warns against being puffed up over teachers — here Paul avoids boasting in others' work, consistent with that humility.