1 Corinthians 16:5
Now I will come unto you, when I shall pass through Macedonia: for I do pass through Macedonia.
Cross-reference
In 1 Corinthians 11:34, Paul also mentions his coming to Corinth to set matters in order — reinforcing his intended visit.
Acts 19:21 records Paul's same plan to pass through Macedonia and Achaia, confirming his itinerary.
Acts 20:1-3 describes Paul's actual journey through Macedonia to Greece, fulfilling the plan here.
2 Corinthians 1:15-16 shows a different itinerary Paul later planned, contrasting with the original plan here.
In 2 Corinthians 1:16, Paul details the same travel plan — going through Corinth both to and from Macedonia.
In 2 Corinthians 7:5, Paul recounts his actual arrival in Macedonia — the very place he plans to go here.
In Romans 15:24, Paul similarly expresses his plan to visit them en route to Spain — consistent with his itinerary here.
In 2 Corinthians 12:14, Paul mentions being ready to come a third time — consistent with his pattern of visits.