Thematic Bible: Necessity of, denied by paul

(But neither was Titus, who was with me, being a Greek, compelled to be circumcised, Because of false brethren introduced unawares, who came in privily, to spy out our liberty which we have through Christ Jesus, that they might bring us into bondage: To whom we did not yield by submission, no, not an hour, that the truth of the gospel might continue with you.)