Romans 9:14

10 Not only that, but Rebecca’s children were conceived by one man, our father Isaac.

11 Yet before the twins were born or had done anything good or bad, in order that God’s plan of election might stand,

12 not by works but by Him who calls, she was told, “The older will serve the younger.”

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

14 What then shall we say? Is God unjust? Certainly not!

15 For He says to Moses: “I will have mercy on whom I have mercy, and I will have compassion on whom I have compassion.”

16 So then, it does not depend on man’s desire or effort, but on God’s mercy.

17 For the Scripture says to Pharaoh: “I raised you up for this very purpose, that I might display My power in you, and that My name might be proclaimed in all the earth.”

18 Therefore God has mercy on whom He wants to have mercy, and He hardens whom He wants to harden.

Read all of Romans 9