Romans 15:24 first mentions the Spain travel plan—this later verse reaffirms the same itinerary before delivering the collection.

Philippians 4:17 uses the same 'fruit' metaphor for financial gifts—showing Paul's consistent view of offerings as spiritual fruit credited to the giver.

James 4:13-15 warns against presumptuous planning without 'if the Lord wills'—directly applicable to Paul's travel plans, which he later qualifies with God's will.