1 Corinthians 3:1 Brothers and sisters, I could not address you as people who live by the Spirit but as people who are still worldly—mere infants in Christ.

Hebrews 5:11-14 Concerning him we have much to say, and it is hard to explain, since you have become dull of hearing. For though by this time you ought to be teachers, you have need again for someone to teach you the elementary principles of the oracles of God, and you have come to need milk and not solid food. For everyone who partakes only of milk is not accustomed to the word of righteousness, for he is an infant.read more.

1 Corinthians 3:2 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,

1 Corinthians 14:20 Brethren, do not be children in your thinking; yet in evil be infants, but in your thinking be mature.

Galatians 4:1 Now I say, as long as the heir is a child, he does not differ at all from a slave although he is owner of everything,