Genesis 25:20-22

Darby Translation

²⁰ And Isaac was forty years old when he took Rebecca as wife, the daughter of Bethuel the Syrian of Padan-Aram, the sister of Laban the Syrian.

²¹ And Isaac entreated Jehovah for his wife, because she was barren; and Jehovah was entreated of him, and Rebecca his wife conceived.

²² And the children struggled together within her; and she said, If [it be] so, why am I thus? And she went to inquire of Jehovah.