1. Mose 25:21

Isaac entreated the Lord for his wife - Isaac and Rebekah had now lived nineteen years together without having a child; for he was forty years old when he married Rebekah, Gen 25:20, and he was threescore years of age when Jacob and Esau were born, Gen 25:26. Hence it is evident they had lived nineteen years together without having a child. The form of the original in this place is worthy of notice: Isaac entreated Jehovah, לנכח אשתו lenochach ishto, directly, purposely, especially, for his wife. Ainsworth thinks the words imply their praying together for this thing; and the rabbins say that "Isaac and Rebekah went on purpose to Mount Moriah, where he had been bound, and prayed together there that they might have a son." God was pleased to exercise the faith of Isaac previous to the birth of Jacob, as he had exercised that of Abraham previous to his own birth.

Isaac entreated the Lord for his wife--Though tried in a similar way to his father, he did not follow the same crooked policy. Twenty years he continued unblessed with offspring, whose seed was to be "as the stars" [Gen 26:4]. But in answer to their mutual prayers (Pe1 3:7), Rebekah was divinely informed that she was to be the mother of twins, who should be the progenitors of two independent nations; that the descendants of the younger should be the more powerful and subdue those of the other (Rom 9:12; Ch2 21:8).

And Isaac entreated the Lord for his wife,.... Was very earnest and constant in his supplications for her, as the word signifies, as is observed by Jarchi; or, "before his wife" (a), she being present, and joining with him in his prayers: the reason was: because she was barren; which appeared by the length of time they had been married, which was near twenty years, see Gen 25:26. The Jewish writers (b) say, that, after twenty years, Isaac took her and went with her to Mount Moriah, to the place where he was bound, and prayed that she might conceive; putting the Lord in mind of the promise he there made of the multiplication of Abraham's seed, Gen 22:17, and the Lord was entreated of him; he granted him his request; for, though God has purposed and promised to do many things for his people, yet he will be sought unto by them to do them for them: and Rebekah his wife conceived; two sons at once, as it follows. (a) "praesente uxore sua", Munster, Fagins. (b) Pirke Eliezer, c. 32. Targum. Jon. in loc. Shalshalet Hakabala, fol. 3. 1.

Isaac's marriage, like Abraham's, was for a long time unfruitful; not to extreme old age, however, but only for 20 years. The seed of the promise was to be prayed for from the Lord, that it might not be regarded merely as a fruit of nature, but be received and recognised as a gift of grace. At the same time Isaac was to be exercised in the patience of faith in the promise of God. After this lengthened test, Jehovah heard his prayer in relation to his wife. לנוכח, Gen 25:21 and Gen 30:38, lit., opposite to, so that the object is before the eyes, has been well explained by Luther thus: quod toto pectore et intentus in calamitatem uxoris oraverit. Sicut quando oro pro aliquo, propono illum mihi in conspectum cordis mei, et nihil aliud video aut cogito; in eum solum animo intueor. Gen 25:22-23 When Rebekah conceived, the children struggled together in her womb. In this she saw an evil omen, that the pregnancy so long desired and entreated of Jehovah would bring misfortune, and that the fruit of her womb might not after all secure the blessing of the divine promise; so that in intense excitement she cried out, "If it be so, wherefore am I?" i.e., why am I alive? cf. Gen 27:46. But she sought counsel from God: she went to inquire of Jehovah. Where and how she looked for a divine revelation in the matter, is not recorded, and therefore cannot be determined with certainty. Some suppose that it was by prayer and sacrifice at a place dedicated to Jehovah. Others imagine that she applied to a prophet - to Abraham, Melchizedek, or Shem (Luther); a frequent custom in Israel afterwards (Sa1 9:9), but not probable in the patriarchal age. The divine answer, couched in the form of a prophetic oracle, assured her that she carried two nations in her womb, one stronger than the other; and…

The sacred historian, in this chapter, I. Takes his leave of Abraham, with an account, I. Of his children by another wife (Gen 25:1-4). 2. Of his last will and testament (Gen 25:5, Gen 25:6). 3. Of his age, death, and burial (Gen 25:7-10). II. He takes his leave of Ishmael, with a short account, 1. Of his children (Gen 25:12-16). 2. Of his age and death (Gen 25:17, Gen 25:18). III. He enters upon the history of Isaac. 1. His prosperity (Gen 25:11). 2. The conception and birth of his two sons, with the oracle of God concerning them (Gen 25:19-26). 3. Their different characters (Gen 25:27, Gen 25:28). 4. Esau's selling his birthright to Jacob (Gen 25:29-34).

25:21 For twenty years, Rebekah was barren (cp. 25:20, 26), like Sarah (see 16:1). This condition tested their faith (see study note on 16:1-3). How could they be childless when God promised that nations would issue from them? • Isaac pleaded with the Lord and the Lord answered Isaac’s prayer. Isaac apparently learned from his father’s mistake and responded in faith.