In 2 Corinthians 11:9, Paul explains how the Macedonians supplied his needs, specifying the source of the support mentioned in verse 8.

2 Corinthians 12:13 repeats Paul's point about not burdening the Corinthians, reinforcing the same defense from a different angle.

Philippians 4:14-16 shows the Philippians were one of the churches that supported Paul, giving concrete background to his 'robbing' claim.

Philippians 4:15 specifies that the Philippians were the only church that partnered with Paul in giving, adding detail to the 'other churches' he robbed.