Romans 9:13

Not only so, but Rebekah also conceived by one, by our father Isaac.

For being not yet born, neither having done anything good or bad, that the purpose of God according to election might stand, not of works, but of him who calls,

it was said to her, “The elder will serve the younger.”

What shall we say then? Is there unrighteousness with God? May it never be!

For he said to Moses, “I will have mercy on whom I have mercy, and I will have compassion on whom I have compassion.”

So then it is not of him who wills, nor of him who runs, but of God who has mercy.