'Freewoman' in the Bible

For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.

But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.

But the heavenly Jerusalem is the free woman, and she is our spiritual mother.

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.

Therefore, brothers, we are not children of the slave but of the free woman.