27 For it is written, Rejoice, thou barren that bearest not; break forth and cry, thou that travailest not: for the desolate hath many more children than she who hath a husband.
28 Now 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 saith the scripture? Cast out the bond-woman and her son: for the son of the bond-woman shall not be heir with the son of the free-woman.
31 So then, brethren, we are not children of the bond-woman, but of the free.