21Tell me, you who want to be under the law, do you not hear the law?22For it is written that Abraham had two sons, one by the maidservant and one by the free woman.23But the one by the maidservant was born according to the flesh, while the one by the free woman was born through the promise.24These things are being presented as an allegory, for these women are two covenants: one from Mount Sinai, bearing children for slavery, which is Hagar.25Now Hagar stands for Mount Sinai in Arabia and corresponds to the present Jerusalem, for she is in slavery with her children.26But the Jerusalem above is free, and she is our mother.27For it is written, "Rejoice, O barren woman who does not give birth; break forth and cry aloud, you who are not in labor, because the children of the desolate woman are more numerous than those of the woman who has a husband."28Now you, brothers, are children of the promise like Isaac.29But just as at that time the one born according to the flesh persecuted the one born according to the Spirit, so it is now also.30But what does the Scripture say? "Cast out the maidservant and her son, for the son of the maidservant shall not inherit with the son of the free woman."31Therefore, brothers, we are not children of the maidservant but of the free woman.