8 Bible Verses about Division Among Christians

But some men came down from Judea and were teaching the brethren, "Unless you are circumcised according to the custom of Moses, you cannot be saved." And when Paul and Barnabas had no small dissension and debate with them, Paul and Barnabas and some of the others were appointed to go up to Jerusalem to the apostles and the elders about this question. So, being sent on their way by the church, they passed through both Phoenicia and Samaria, reporting the conversion of the Gentiles, and they gave great joy to all the brethren.read more.
When they came to Jerusalem, they were welcomed by the church and the apostles and the elders, and they reported all that God had done with them. But some believers who belonged to the party of the Pharisees stood up, and said, "It is necessary to circumcise them, and to charge them to keep the Law of Moses."

I urge you, brethren, to take note of those who cause divisions and difficulties, contrary to the doctrine which you have learned; avoid them.

I appeal to you, brethren, by the name of our Lord Jesus Christ, that all of you agree and that there be no divisions among you, but that you be united in the same mind and in the same judgment. For I have been informed by Chloe's people, that there are quarrels among you, my brethren. What I mean is this, that each 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 still carnal. For since there is jealousy and strife among you, are you not carnal, and are you not walking like mere men?

When any one of you has a grievance against a brother, does he dare go to law before the unrighteous instead of before the saints?

For, in the first place, when you come together as a church, I hear that there are divisions among you; and I partly believe it.

Watch out for the dogs, watch out for the evil workers, watch out for those mutilators of the body.

They went out from us, but they were not of us; for if they had been of us, they would have continued with us; but they went out that it might be plain that none of them were of us.