Galatians 4:28

²³However, the son by the servant was born according to the flesh, but the son by the free woman was born through promise.

⁸That is, it is not the children of the flesh who are children of God, but the children of the promise are counted as heirs. ⁹For this is a word of promise: “At the appointed time I will come, and Sarah will have a son.”

¹³For the promise to Abraham and to his offspring that he would be heir of the world wasn’t through the law, but through the righteousness of faith. ¹⁴For if those who are of the law are heirs, faith is made void, and the promise is made of no effect. ¹⁵For the law produces wrath; for where there is no law, neither is there disobedience.

¹⁶For this cause it is of faith, that it may be according to grace, to the end that the promise may be sure to all the offspring, not to that only which is of the law, but to that also which is of the faith of Abraham, who is the father of us all. ¹⁷As it is written, “I have made you a father of many nations.”This is in the presence of him whom he believed: God, who gives life to the dead, and calls the things that are not, as though they were. ¹⁸Against hope, Abraham in hope believed, to the end that he might become a father of many nations, according to that which had been spoken, “So will your offspring be.”

²⁹If you are Christ’s, then you are Abraham’s offspring and heirs according to promise.

²⁵You are the children of the prophets, and of the covenant which God made with our fathers, saying to Abraham, ‘All the families of the earth will be blessed through your offspring.’