In 2 Corinthians 13:9, Paul is glad when he is weak and they are strong—directly mirroring 'death at work in us, but life in you'.

In 2 Corinthians 12:15, Paul says he will 'most gladly spend and be spent' for them—echoing 'death works in us, life in you' as self-sacrifice for others.

In 1 Corinthians 4:10, Paul says 'we are weak, but you are strong'—the exact same contrast of apostolic weakness for the church's benefit.

In 1 John 3:16, Christ's sacrificial death models laying down life for others — Paul's death-working ministry echoes that self-giving love.

In Philippians 2:17, Paul describes being poured out as a drink offering for their faith—the same concept of his life expended for their spiritual life.

In Acts 20:24, Paul counts his life as nothing to finish his ministry—reflecting the same willingness that death works in him for the Corinthians' life.

In Philippians 2:30, Epaphroditus nearly died for the work of Christ—illustrating the principle of death at work for the life of others, as Paul describes here.