Isaac pleaded with Yahweh on behalf of his wife, because she was barren. Yahweh heard his plea, and his wife Rebekah conceived.
In context
19This is the account of Isaac, Abraham’s son. Abraham fathered Isaac. 20Isaac was forty years old when he married Rebekah, daughter of Bethuel the Aramean of Paddan-aram and sister of Laban the Aramean. 21Isaac pleaded with Yahweh on behalf of his wife, because she was barren. Yahweh heard his plea, and his wife Rebekah conceived. 22The children struggled with each other inside her, and she said, “If this is how it is, why do I even exist?” So she went to inquire of Yahweh. 23Yahweh said to her: “Two nations are in your womb, two peoples will divide as they leave your body. One will be stronger than the other, and the older will serve the younger.”
