Romans 9:13-18

13Just as it is written: “Jacob I loved, but Esau I hated.” Mal. 1:2,3 14What then shall we say? Is God unjust? Not at all!

15For he says to Moses, “I will have mercy on whom I have mercy, and I will have compassion on whom I have compassion.” Exodus 33:19 16It does not, therefore, depend on human desire or effort, but on God’s mercy. 17For 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.” Exodus 9:16

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