²⁸ Now we, brothers, as Isaac was, are the children of the undertaking of God.

²⁹ And if you are Christ's, then you are Abraham's seed, and yours is the heritage by the right of God's undertaking given to Abraham.

²³ Now the son by the servant-woman has his birth after the flesh; but the son by the free woman has his birth through the undertaking of God.

¹³ For God's word, that the earth would be his heritage, was given to Abraham, not through the law, but through the righteousness of faith.

¹⁴ For if they who are of the law are the people who get the heritage, then faith is made of no use, and the word of God has no power;

¹⁵ For the outcome of the law is wrath; but where there is no law it will not be broken.

¹⁶ For this reason it is of faith, so that it may be through grace; and so that the word of God may be certain to all the seed; not only to that which is of the law, but to that which is of the faith of Abraham, who is the father of us all,

¹⁷ (As it is said in the holy Writings, I have made you a father of a number of nations) before him in whom he had faith, that is, God, who gives life to the dead, and to whom the things which are not are as if they were.

¹⁸ Who without reason for hope, in faith went on hoping, so that he became the father of a number of nations, as it had been said, So will your seed be.

⁸ That is, it is not the children of the flesh, but the children of God's undertaking, who are named as the seed.

⁹ For this is the word of God's undertaking, At this time will I come, and Sarah will have a son.

²⁵ You are the sons of the prophets, and of the agreement which God made with your fathers, saying to Abraham, Through your seed a blessing will come on all the families of the earth.