Gal.4.3In the same way we also, when we were children, were enslaved to the elementary principles of the world.
Gal.4.9But now that you have come to know God, or rather to be known by God, how can you turn back again to the weak and worthless elementary principles of the world, whose slaves you want to be once more?
Heb.5.12For though by this time you ought to be teachers, you need someone to teach you again the basic principles of the oracles of God. You need milk, not solid food,