we can see in 1 Cor 1:10-13 that the christians we dividing themselves during the first century and paul condems them. and a denomination is a division of something. 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. 11: For it hath been declared unto me of you, my brethren, by them which are of the house of Chloe, that there are contentions among you. 12: Now this I say, that every one of you saith, I am of Paul; and I of Apollos; and I of Cephas; and I of Christ. 13: Is Christ divided? was Paul crucified for you? or were ye baptized in the name of Paul?