1 Corinthians 3:4

Now I mean this, that each one of you is saying, “I am of Paul,” and “I of Apollos,” and “I of Cephas,” and “I of Christ.”

for you are still fleshly. For since there is jealousy and strife among you, are you not fleshly, and are you not walking like mere men?

Now these things, brothers, I have applied to myself and Apollos for your sakes, so that in us you may learn not to go beyond what is written, so that no one of you will become puffed up on behalf of one against the other.

For I make known to you, brothers, that the gospel which I am proclaiming as good news is not according to man.