Paul announced his plan to return to Corinth for the third time (see study note on 12:14–15). He found support for his plan in the Scriptures. The reason for this quote is unclear. However, considering the context of Deuteronomy 19:15, Paul might have wanted to warn them. He intended to judge every wrongdoing (listed in 2 Corinthians 12:20–21) upon his arrival. The two or three witnesses against the Corinthian wrongdoers were Paul's letters or visits and his promise to come the third time.