And brothers I exhort you to watch the ones making divisions and causes of stumbling contrary to the doctrine which you learned, and turn away from them.
But if he refuses to hear them, tell it to the assembly. And if he also refuses to hear the assembly, let him be to you as the pagan and the tax collector.
Woe to the world from its stumblingblocks! It is a necessity for the stumbling blocks to come, yet woe to that man through whom the stumbling-block comes!
Since we heard that some of us going out have troubled you with words, unsettling your souls, saying, Be circumcised and keep the Law, to whom we gave no command;
But it was because of the ones brought in stealthily false brothers, who stole in to spy on our freedom which we have in Christ Jesus, they desiring to enslave us,
Watch that there will not be one abducting you through philosophy and empty deceit, according to the tradition of men, according to the elements of the world, and not according to Christ.
And we command you, brothers, in the name of our Lord Jesus Christ, to draw yourselves back from every brother walking in a disorderly way, and not according to the teaching which you received from us.
They went out from us, but they were not of us. For if they were of us, they would have remained with us; but they left so that it might be revealed that they all are not of us.