2 Corinthians 2:5

The person who caused sorrow to Paul and the Corinthians seems to have done so by insulting Paul either when Paul had been in Corinth last or since then. He was probably either the incestuous person referred to in 1 Corinthians 5:1-8. [Note: Hughes, pp. 63-64, 70; et al.] Or he may have been someone who had been rude to Paul, probably by challenging his apostolic authority. [Note: Harris, p. 328; Tasker, p. 52; Barnett, p. 124; et al.]