1 Corinthians 3:1-4

1 Brothers, I couldn't speak to you as to spiritual, but as to fleshly, as to babies in Christ.  2 I fed you with milk, not with meat; for you weren't yet ready. Indeed, not even now are you ready,  3 for you are still fleshly. For insofar as there is jealousy, strife, and factions among you, aren't you fleshly, and don't you walk in the ways of men?  4 For when one says, "I follow Paul," and another, "I follow Apollos," aren't you fleshly?