Genesis 25:23-26

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.” When her days to be delivered were fulfilled, behold, there were twins in her womb. The first came out reddish all over like a hairy garment; and they named him Esau (hairy). Afterward his brother came out, and his hand grasped Esau’s heel, so he was named Jacob (one who grabs by the heel, supplanter). Isaac was sixty years old when Rebekah gave birth to them.