Genesis 25:21

וַיֶּעְתַּ֨ר יִצְחָ֤ק לַֽיהוָה֙ לְנֹ֣כַח אִשְׁתּ֔וֹ כִּ֥י עֲקָרָ֖ה הִ֑וא וַיֵּעָ֤תֶר לוֹ֙ יְהוָ֔ה וַתַּ֖הַר רִבְקָ֥ה אִשְׁתּֽוֹ׃

ἐδεῖτο δὲ Ἰσαὰκ κυρίου περὶ Ῥεβέκκας τῆς γυναικὸς αὐτοῦ, ὅτι στεῖρα ἦν. ἐπήκουσεν δὲ αὐτοῦ ὁ θεός, καὶ ἔλαβεν ἐν γαστρὶ Ῥεβέκκα ἡ αὐτοῦ.

Greek text from Swete's edition, CC BY-SA 4.0

Y oró Isaac á Jehová por su mujer, que era estéril; y aceptólo Jehová, y concibió Rebeca su mujer.

Later, Isaac prayed to the LORD on behalf of his wife, because she was barren. And the LORD heard his prayer, and his wife Rebekah conceived.