Galatians 4:7

4:7 So you are no longer a slave but a son, and if you are a son, then you are also an heir through God.

Galatians 4:9

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?