8 Bible Verses about Division Among Christians

And certain men who came down from Judea taught the brethren, and said, Except you be circumcised after the manner of Moses, you cannot be saved. When therefore Paul and Barnabas had no small dissension and dispute with them, they determined that Paul and Barnabas, and certain other of them, should go up to Jerusalem unto the apostles and elders about this question. And being brought on their way by the church, they passed through Phoenicia and Samaria, declaring the conversion of the Gentiles: and they caused great joy unto all the brethren.read more.
And when they were come to Jerusalem, they were received of the church, and of the apostles and elders, and they declared all things that God had done with them. But there rose up certain of the sect of the Pharisees who believed, saying, It is needful to circumcise them, and to command them to keep the law of Moses.

Now I beseech you, brethren, mark them who cause divisions and offenses contrary to the doctrine which you have learned; and avoid them.

Now I beseech you, brethren, by the name of our Lord Jesus Christ, that you all speak the same thing, and that there be no divisions among you; but that you be perfectly joined together in the same mind and in the same judgment. For it has been declared unto me of you, my brethren, by them who are of the house of Chloe, that there are contentions among you. Now this I say, that every one of you says, I am of Paul; and I of Apollos; and I of Cephas; and I of Christ.read more.
Is Christ divided? was Paul crucified for you? or were you baptized in the name of Paul?

For you are yet carnal: for while there is among you envying, and strife, and divisions, are you not carnal, and walk as men?

Dare any of you, having a matter against another, go to law before the unjust, and not before the saints?

For first of all, when you come together in the church, I hear that there be divisions among you; and I partly believe it.

Beware of dogs, beware of evil workers, beware of the mutilators.

They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.