Genesis 25:22-23

But the children struggled together within her [kicking and shoving one another]; and she said, “If it is so [that the LORD has heard our prayer], why then am I this way?” So she went to inquire of the LORD [praying for an answer]. The LORD said to her, “[The founders of] two nations are in your womb; And the separation of two nations has begun in your body; The one people shall be stronger than the other; And the older shall serve the younger.”