Galatians 4:3

4:3 So also we, when we were minors, were enslaved under the basic forces of the world.

Galatians 4:9-10

4:9 But 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 basic forces? Do you want to be enslaved to them all over again? 4:10 You are observing religious days and months and seasons and years.

Galatians 4:25

4:25 Now Hagar represents Mount Sinai in Arabia and corresponds to the present Jerusalem, for she is in slavery with her children.