Godbey(i)
22 For it is written that Abraham had two sons; one by a bond-maid and one by a freewoman.
23 But the one indeed of the bond-maid was born according to the flesh, and the one of the freewoman through the promise.
24 Which things are allegorized: for these are the two covenants; the one indeed from mount Sinai, generating children into bondage, which is Hagar.
25 For this mount Sinai is in Arabia, and corresponds with Jerusalem which now is: for she is in bondage with her children.
26 But Jerusalem who is above is free, who is our mother:
27 for it is written, Rejoice, thou barren one who does not bring forth; break forth and cry aloud, thou that dost not travail: because many more are the children of the barren than of her having a husband.
28 But you, brethren, are the children of Isaac, according to the promise.
29 But as the one at that time having been born according to the flesh persecuted the one according to the Spirit, even so it is now.
30 But what says the scripture? Cast out the bondwoman and her son: for the son of the bondwoman shall not inherit with the son of the free.
31 Therefore, brethren, we are not the children of the bondwoman, but of the free.