1 Corinthians 3:1; 1 Corinthians 3:3-4

1 Brothers, I could not address you as spiritual but as worldly--mere infants in Christ.
3 You are still worldly. For since there is jealousy and quarreling among you, are you not worldly? Are you not acting like mere men? 4 For when one says, "I follow Paul," and another, "I follow Apollos," are you not mere men?