8 Bible Verses about Division Among Christians

Now some men came down from Judea and began to teach the brothers, "Unless you are circumcised according to the custom of Moses, you cannot be saved." When Paul and Barnabas had a major argument and debate with them, the church appointed Paul and Barnabas and some others from among them to go up to meet with the apostles and elders in Jerusalem about this point of disagreement. So they were sent on their way by the church, and as they passed through both Phoenicia and Samaria, they were relating at length the conversion of the Gentiles and bringing great joy to all the brothers.read more.
When they arrived in Jerusalem, they were received by the church and the apostles and the elders, and they reported all the things God had done with them. But some from the religious party of the Pharisees who had believed stood up and said, "It is necessary to circumcise the Gentiles and to order them to observe the law of Moses."

Now I urge you, brothers and sisters, to watch out for those who create dissensions and obstacles contrary to the teaching that you learned. Avoid them!

I urge you, brothers and sisters, by the name of our Lord Jesus Christ, to agree together, to end your divisions, and to be united by the same mind and purpose. For members of Chloe's household have made it clear to me, my brothers and sisters, that there are quarrels among you. Now I mean this, that each of you is saying, "I am with Paul," or "I am with Apollos," or "I am with Cephas," or "I am with Christ."read more.
Is Christ divided? Paul wasn't crucified for you, was he? Or were you in fact baptized in the name of Paul?

for you are still influenced by the flesh. For since there is still jealousy and dissension among you, are you not influenced by the flesh and behaving like unregenerate people?

When any of you has a legal dispute with another, does he dare go to court before the unrighteous rather than before the saints?

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

Beware of the dogs, beware of the evil workers, beware of those who mutilate the flesh!

They went out from us, but they did not really belong to us, because if they had belonged to us, they would have remained with us. But they went out from us to demonstrate that all of them do not belong to us.