27 For it is written: “Rejoice, barren womanwho does not bear;break forth and shout,you who have no labor pains!For the desolate has many more childrenthan she who has a husband.”
28 Now we, brothers, like Isaac, are the children of promise.
29 But as it was then, he who was born after the flesh persecuted him who was born after the Spirit, so it is now also.
30 Nevertheless what does the Scripture say? “Cast out the slave woman and her son, for the son of the slave woman shall not be heir with the son of the free woman.”
31 So then, brothers, we are not children of the slave woman, but of the free woman.