2 Corinthians 9:4
Lest haply if they of Macedonia come with me, and find you unprepared, we (that we say not, ye) should be ashamed in this same confident boasting.
Cross-reference
2 Corinthians 9:2
Parallel
In 2 Corinthians 9:2, Paul boasts about the Corinthians' eagerness to the Macedonians—so 9:4's shame would follow if that boast proves false.
2 Corinthians 9:3
Parallel
In 2 Corinthians 9:3, Paul sent brothers to prevent the very shame described in 9:4—the verse explains the measure taken to avoid embarrassment.
2 Corinthians 8:24
Parallel
In 2 Corinthians 8:24, Paul urges the Corinthians to prove their love and his boasting—exactly what 9:4 worries may fail when Macedonians come.
2 Corinthians 8:1–5
Contrast
In 2 Corinthians 8:1-5, the Macedonians are models of generous giving—ironically, they are the ones Paul fears will witness the Corinthians' lack.
2 Corinthians 12:21
Parallel
In 2 Corinthians 12:21, Paul fears humiliation again—this time over unrepentant sin, echoing his fear here of being ashamed over unprepared giving.