Romans 9:11-15, 18, 21

(for the children not yet being born, nor having done any good or evil, that the purpose of God according to election might stand, not of works but of Him who calls), it was said to her, “The older shall serve the younger.” As it is written, “Jacob I have loved, but Esau I have hated.” What shall we say then? Is there unrighteousness with God? Certainly not! For He says to Moses, “I will have mercy on whomever I will have mercy, and I will have compassion on whomever I will have compassion.”

Therefore He has mercy on whom He wills, and whom He wills He hardens.

Does not the potter have power over the clay, from the same lump to make one vessel for honor and another for dishonor?