Romans 9:7-13

9:7 nor are all the children Abraham’s true descendants; rather “through Isaac will your descendants be counted.” 9:8 This means it is not the children of the flesh who are the children of God; rather, the children of promise are counted as descendants. 9:9 For this is what the promise declared: “About a year from now I will return and Sarah will have a son.” 9:10 Not only that, but when Rebekah had conceived children by one man, our ancestor Isaac – 9:11 even 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) – 9:12 it was said to her, “The older will serve the younger,” 9:13 just as it is written: “Jacob I loved, but Esau I hated.”

Romans 9:18

9:18 So then, God has mercy on whom he chooses to have mercy, and he hardens whom he chooses to harden.

Romans 9:21-24

9:21 Has the potter no right to make from the same lump of clay one vessel for special use and another for ordinary use? 9:22 But what if God, willing to demonstrate his wrath and to make known his power, has endured with much patience the objects of wrath prepared for destruction? 9:23 And what if he is willing to make known the wealth of his glory on the objects of mercy that he has prepared beforehand for glory – 9:24 even us, whom he has called, not only from the Jews but also from the Gentiles?