1 Corinthians 1:10; 1 Corinthians 11:18; 1 Corinthians 12:25

10 Now I beseech you, brethren, by 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 perfectly joined together in the same mind and in the same judgment.
18 For first of all, when ye come together in the church, I hear that there be divisions among you; and I partly believe it.
25 That there should be no schism in the body; but that the members should have the same care one for another.