1 Corinthians 3:1-5

And I, brethren, could not speak to you as to spiritual men, but as to men of flesh, as to infants in Christ. I gave you milk to drink, not solid food; for you were not yet able to receive it. Indeed, even now you are not yet able, 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? For when one says, “I am of Paul,” and another, “I am of Apollos,” are you not mere men? What then is Apollos? And what is Paul? Servants through whom you believed, even as the Lord gave opportunity to each one.