8 Bible Verses about Division Among Christians

And some, coming down from Judaea, were teaching the brethren, "Unless ye be circumcised after the custom of Moses, ye cannot be saved." And, when Paul and Barnabas had no little dissension and discussion with them, they arranged that Paul and Barnabas and some others of them should go up to Jerusalem to the apostles and elders, concerning this question. They, therefore, having been sent forward by the assembly, went through both Phoenicia and Samaria, declaring the conversion of the gentiles; and they were causing great joy to all the brethren.read more.
And, having come to Jerusalem, they were welcomed by the assembly and apostles and elders; and they rehearsed as many things as God wrought with them. But there rose up some from the sect of the Pharisees, who believed, saying, "It is necessary to circumcise them, and to charge them to keep the law of Moses."

Now I beseech you, brethren, to mark those who are causing the divisions and occasions of stumbling, contrary to the teaching which ye learned; and turn away from them.

Now I beseech you, brethren, through the name of our Lord Jesus Christ, that ye all speak the same thing, and that there be no divisions among you; but that ye be perfected in the same mind, and in the same judgment. For it was signified to me concerning you, my brethren, by those of the house of Chloe, that there are contentions among you. Now I mean this: that each one of you is saying, "I am of Paul;" and "I of Apollos;" and "I of Cephas:" and "I of Christ!"read more.
Hath Christ been divided? Was Paul crucified for you? Or were ye immersed into the name of Paul?

for ye are yet carnal; for whereas there is among you jealousy and strife, are ye not carnal, and do ye not walk as men?

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

For, first, when ye come together in an assembly, I hear that divisions exist among you; and I partly believe it;

Beware of the dogs, beware of the evil-workers, beware of the mutilation.

They went out from among 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 they might be made manifest, that they are not all of us.