So when her days were fulfilled for her to give birth, indeed there were twins in her womb.
Genesis 25:24
Surrounding context
25:23 And the LORD said to her: "Two nations are in your womb, Two peoples shall be separated from your body; One people shall be stronger than the other, And the older shall serve the younger."
25:24 So when her days were fulfilled for her to give birth, indeed there were twins in her womb.
25:25 And the first came out red. He was like a hairy garment all over; so they called his name Esau.