2 Corinthians 10:17

Ὁ δὲ καυχώμενος. But, even in reference to a man’s own work in his own proper sphere, there is only one right way of glorying; he that glorieth, let him glory in the Lord, who assigned him the work and enables him to do it. These words are quoted as Scripture in 1 Corinthians 1:31, and they are an adaptation of Jeremiah 9:24, ἐν τούτῳ καυχάσθω ὁ καυχώμενος, συνίειν καὶ γινώσκειν ὅτι ἐγώ εἰμι Κύριος. The Apostle follows the principle, which he here enunciates, 1 Corinthians 15:10; Romans 15:17-19; Galatians 2:8; Ephesians 3:7.

It is evident that these verses (13–17) are addressed to the whole Corinthian Church, and not to the disloyal faction only.