27. For it is written, Rejoice, thou barren that bearest not; break forth into praise and cry, thou that travailest not: for the desolate has many more children than she who has a husband.
28. So that we, brethren, as Isaac was, are the children of promise.
29. But as then he that was born according to the flesh persecuted him that was born according to the Spirit, even so it is now.
30. Nevertheless what does the scripture say? Cast out the bondwoman and her son, for the son of the bondwoman shall not be heir with the son of the freewoman.
31. So then, brethren, we are not children of the bondwoman, but of the free.