"I urge you, brothers, to watch out for those who create dissensions and obstacles, in opposition to the teaching that you learned; avoid them. For such people do not serve our Lord Christ but their own appetites, and by fair and flattering speech they deceive the hearts of the innocent. (Rom 16:17,18)
“I urge you, brothers, in the name of our Lord Jesus Christ, that all of you agree in what you say, and that there be no divisions among you, but that you be united in the same mind and in the same purpose. For it has been reported to me about you, my brothers, by Chloe’s people, that there are rivalries among you. I mean that each of you is saying, “I belong to Paul,” or “I belong to Apollos,” or “I belong to Kephas,” or “I belong to Christ.” Is Christ divided? Was Paul crucified for you? Or were you baptized in the name of Paul?” (1 Cor 1:10-13)
“I…urge you to live in a manner worthy of the call you have received, with all humility and gentleness, with patience, bearing with one another through love, striving to preserve the unity of the spirit through the bond of peace: one body and one Spirit, as you were also called to the one hope of your call; one Lord, one faith, one baptism; one God and Father of all, who is over all and through all and in all.” (Eph 4:1-6)