Genesis 25:20 KJV
And Isaac was forty years old when he took Rebekah to wife, the daughter of Bethuel the Syrian of Padan–aram, the sister to Laban the Syrian.
Genesis 25:20, King James Version
In context
19 And these are the generations of Isaac, Abraham’s son: Abraham begat Isaac:
20 And Isaac was forty years old when he took Rebekah to wife, the daughter of Bethuel the Syrian of Padan–aram, the sister to Laban the Syrian.
21 And Isaac intreated the Lord for his wife, because she was barren: and the Lord was intreated of him, and Rebekah his wife conceived.