Romans 9:14-18

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.”

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.”

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