Thematic Bible: Necessity of, denied by paul

But neither Titus, who was with me, being a Greek, was compelled to be circumcised: And because of false brethren brought in unawares, who came in secretly to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage: To whom we yielded in subjection, no, not for an hour; that the truth of the gospel might continue with you.