'Food' in the Bible

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,

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.

lest any one be a fornicator, or a profane person, as Esau, who in exchange for one morsel of food did sell his birthright,