Romans 9:7-13

7nor are all the children Abraham’s true descendants; rather “through Isaac will your descendants be counted.”

8This means it is not the children of the flesh who are the children of God; rather, the children of promise are counted as descendants.

9For this is what the promise declared: “About a year from now I will return and Sarah will have a son.”

10Not only that, but when Rebekah had conceived children by one man, our ancestor Isaac –

11even before they were born or had done anything good or bad (so that God’s purpose in election would stand, not by works but by his calling) –

12it was said to her, “The older will serve the younger,”

13just as it is written: “Jacob I loved, but Esau I hated.”