William Burkitt on 2 Corinthians 11:22

That is, I have suffered more for Christ, by stripes, by imprisonments, by daily dying, that any of them have done.

Here note, That these false teachers, the Judaizing doctors, were most certainly of the Jewish race; and that they were not only converted to, but did preach up the faith of Christ; but withal, the necessity of circumcision, and the observation of the Jewish rites. These teachers went from Judea, and gave great disturbance to all Christian churches; as Corinth, Galatia, and Philippi: And we often find St. Paul complaining of them, by the name of those of the circumcision; because they required of such as did embrace Christianity, to submit to circumcision and the Jewish law.