John Wycliffe Select English Works 1380
Peter and Paul had the oldest church leadership rivalry of sorts.
1 Cor 1:10 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?