Hebrews 5:11-13

Young's Literal Translation

¹¹ concerning whom we have much discourse and of hard explanation to say, since ye have become dull of hearing,

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,