Now the promises were made to Abraham and to his offspring; it does not say, “And to offsprings,” as of many; but it says, “And to your offspring,” that is, to one person, who is Christ.
He brought him outside and said, “Look toward heaven and count the stars, if you are able to count them.” Then he said to him, “So shall your descendants be.”
But God said to Abraham, “Do not be distressed because of the boy and because of your slave woman; whatever Sarah says to you, do as she tells you, for it is through Isaac that offspring shall be named for you.
The scepter shall not depart from Judah, nor the ruler's staff from between his feet, until tribute comes to him; and the obedience of the peoples is his.
You are the descendants of the prophets and of the covenant that God gave to your ancestors, saying to Abraham, ‘And in your descendants all the families of the earth shall be blessed.’
For this reason it depends on faith, in order that the promise may rest on grace and be guaranteed to all his descendants, not only to the adherents of the law but also to those who share the faith of Abraham (for he is the father of all of us,
Why then the law? It was added because of transgressions, until the offspring would come to whom the promise had been made; and it was ordained through angels by a mediator.
And the scripture, foreseeing that God would justify the Gentiles by faith, declared the gospel beforehand to Abraham, saying, “All the Gentiles shall be blessed in you.”
and not holding fast to the head, from whom the whole body, nourished and held together by its ligaments and sinews, grows with a growth that is from God.