'Slaves' in the Bible

Now this matter arose because of the false brothers with false pretenses who slipped in unnoticed to spy on our freedom that we have in Christ Jesus, to make us slaves.

It was the same way with us. While we were children, we were slaves to the basic principles of the world.

However, in the past, when you did not know God, you were slaves to things that are not really gods at all.

But now that you know God, or rather have been known by God, how can you turn back again to those powerless and bankrupt basic principles? Why do you want to become their slaves all over again?

This is allegorically speaking, for these women are two covenants: one proceeding from Mount Sinai bearing children who are to be slaves; she is Hagar.