4 For when one says, "I follow Paul," and another, "I follow Apollos," are you not merely human?
1 Corinthians 3:4 Cross References - NHEB
1 Corinthians 1:12
12 Now I mean this, that each one of you says, "I follow Paul," "I follow Apollos," "I follow Cephas," and, "I follow Christ."
1 Corinthians 3:3
3 for you are still fleshly. For insofar as there is jealousy and strife among you, are you not fleshly, and living by human standards?
1 Corinthians 4:6
6 Now these things, brothers, I have in a figure transferred to myself and Apollos for your sakes, that in us you might learn not to go beyond the things which are written, that none of you be puffed up against one another.