Galatians 4:22-23

4:22 For it is written that Abraham had two sons, one by the slave woman and the other by the free woman. 4:23 But one, the son by the slave woman, was born by natural descent, while the other, the son by the free woman, was born through the promise.

Galatians 4:10

4:10 You are observing religious days and months and seasons and years.

Galatians 4:31

4:31 Therefore, brothers and sisters, we are not children of the slave woman but of the free woman.