'Milk' in the Bible

I have given you milk to drink, not meat, for ye have not yet been able, nor indeed are ye yet able;

Who ever carries on war at his own charges? who plants a vineyard and does not eat of its fruit? or who herds a flock and does not eat of the milk of the flock?

For when for the time ye ought to be teachers, ye have again need that one should teach you what are the elements of the beginning of the oracles of God, and are become such as have need of milk, and not of solid food.

For every one that partakes of milk is unskilled in the word of righteousness, for he is a babe;

as newborn babes desire earnestly the pure mental milk of the word, that by it ye may grow up to salvation,