Genesis 25:19-21

Young's Literal Translation

¹⁹ And these [are] births of Isaac, Abraham's son: Abraham hath begotten Isaac;

²⁰ and Isaac is a son of forty years in his taking Rebekah, daughter of Bethuel the Aramaean, from Padan-Aram, sister of Laban the Aramaean, to him for a wife.

²¹ And Isaac maketh entreaty to Jehovah before his wife, for she [is] barren: and Jehovah is entreated of him, and Rebekah his wife conceiveth,