But what saith the scripture — Showing the consequence of this. Cast out the bondwoman and her son — Who mocked Isaac. In like manner will God cast out all who seek to be justified by the law; especially if they persecute them who are his children by faith. Genesis 21:10.
Related Commentaries of Galatians 4:30
Galatians 4:30
30 Nevertheless what saith the scripture? Cast out the bondwoman and her son: for the son of the bondwoman shall not be heir with the son of the freewoman.