Genesis 25:21-23

Isaac pleaded with the LORD on behalf of his wife, because she was unable to have children. The LORD answered Isaac’s prayer, and Rebekah became pregnant with twins. But the two children struggled with each other in her womb. So she went to ask the LORD about it. “Why is this happening to me?” she asked. And the LORD told her, “The sons in your womb will become two nations. From the very beginning, the two nations will be rivals. One nation will be stronger than the other; and your older son will serve your younger son.”