In 2 Corinthians 12:13, Paul again defends not burdening the Corinthians — the same 'free of charge' principle he argues here.

In 2 Corinthians 10:1, Paul describes being humble when face to face — consistent with his humbling himself by not charging for the gospel.

Acts 18:1-3 shows Paul working as a tentmaker to support himself — the concrete practice behind his claim of preaching without charge.

Acts 20:34 records Paul's own hands meeting his needs — confirming his consistent practice of self-support, as defended here.

In 1 Corinthians 9:6, Paul similarly defends his right to refrain from working, showing his consistent practice of not claiming support.

In 1 Corinthians 9:12, Paul states he did not use his right to support, echoing his voluntary humility in preaching free.

1 Corinthians 9:14-18 explains Paul’s deliberate choice to forgo support, making free preaching his reward — parallel to his humility.

1 Thessalonians 2:9 describes Paul’s night and day labor to avoid being a burden, identical to his free preaching.

2 Thessalonians 3:8 recounts Paul’s toil to avoid burdening others, directly parallel to his free gospel preaching.

1 Corinthians 9:18 says Paul’s reward is preaching the gospel free of charge, directly echoing his 'without charge' here.

In 1 Corinthians 4:10, Paul contrasts his humble status with the Corinthians' pride — echoing his self-humbling for their exaltation.

Philippians 4:12 describes Paul’s contentment in hunger and need, reflecting the humility shown in preaching without charge.

3 John 1:7 describes missionaries who accept nothing from Gentiles—paralleling Paul's refusal to burden the Corinthians, though differing in who they avoid taking from.