Hebrews 5:12-14

Young's Literal Translation

¹² for even owing to be teachers, because of the time, again ye have need that one teach you what [are] the elements of the beginning of the oracles of God, and ye have become having need of milk, and not of strong food,

¹³ for every one who is partaking of milk [is] unskilled in the word of righteousness -- for he is an infant,

¹⁴ and of perfect men is the strong food, who because of the use are having the senses exercised, unto the discernment both of good and of evil.