1 Corinthians 1:12
What I mean is this: Individuals among you are saying, "I follow Paul," "I follow Apollos," "I follow Cephas," or "I follow Christ."

1 Corinthians 3:3
for you are still worldly. For since there is jealousy and dissension among you, are you not worldly? Are you not walking in the way of man?

1 Corinthians 4:6
Brothers, I have applied these things to myself and Apollos for your benefit, so that you may learn from us not to go beyond what is written. Then you will not take pride in one man over another.

Galatians 1:11
For I certify to you, brothers, that the gospel I preached is not devised by man.