Corinthians 3:1-3

[1] But I, brothers, could not address you as spiritual people, but as people of the flesh, as infants in Christ. [2] I fed you with milk, not solid food, for you were not ready for it. And even now you are not yet ready, [3] for you are still of the flesh. For while there is jealousy and strife among you, are you not of the flesh and behaving only in a human way?