Romans 9:10-17

10Not only that, but Rebekah’s children were conceived at the same time by our father Isaac. 11Yet, before the twins were born or had done anything good or bad – in order that God’s purpose in election might stand: 12not by works but by him who calls – she was told, ‘The older will serve the younger.’
Gen. 25:23
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
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