Genesis 25:21

And Isaac prayed to the Lord for his wife , because she was barren . And the Lord granted his prayer , and Rebekah his wife conceived .

Isaac prayed to the Lord on behalf of his wife, because she was childless. The Lord answered his prayer, and his wife Rebekah became pregnant.

And Isaac intreated the Lord for his wife, because she was barren : and the Lord was intreated of him, and Rebekah his wife conceived.