8 Bible Verses about Division Among Christians

Now some that came down from Judea, taught the brethren, saying, Except ye be circumcised according to the law of Moses, ye cannot be saved. A dissension therefore arising, and Paul and Barnabas having no small dispute with them, it was resolved that Paul and Barnabas, and some others, should go up to the apostles and elders at Jerusalem about this question. They therefore, being brought forward on their way by the church, passed through Phenicia and Samaria, relating the conversion of the Gentiles: and they gave great joy to all the brethren.read more.
And when they came to Jerusalem, they were received by the church, and by the apostles and elders, and they told them all that God had done by them. But there rose up, said they, some of the sect of the pharisees that believed, saying, that it was necessary to circumcise them, and enjoin them to keep the law of Moses.

Now I exhort you, brethren, to mark those who cause divisions and offences, contrary to the doctrine which ye have learned:

Now I beseech you, brethren, by the name of our Lord Jesus Christ, that ye would all say alike, and that there may be no schisms among you, but that ye be perfectly united in the same mind and in the same judgement. For I have been informed concerning you, my brethren, by some of Chloe's family, that there are contentions among you. I mean, that each of you saith, as if of different parties, I am of Paul, and I of Apollos, I of Cephas, and I of Christ.read more.
Is Christ divided? was Paul crucified for you? or were ye baptized into the name of Paul?

Because ye are still carnal: for while there is among you envy and strife and divisions, are ye not carnal, and do ye not walk as men?

Dare any of you, having a matter of complaint against another, try it before the unjust, and not before the saints?

For first when ye come together in the church, I hear there are divisions among you, and I partly believe it.

Beware of those that are like dogs, beware of evil doers, beware of the concision.

They went out from us, but they were not of us: for if they had been indeed of us, they would have continued with us; but this was done that they might be made manifest, because all, that are with us, are not indeed of us.