Commentaries:
Adam Clarke
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, Genesis 25:20, and he was threescore years of age when Jacob and Esau were born, Genesis 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, 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.
DISCLAIMER: Church of the Great God (CGG) provides these resources to aid the individual in studying the Bible. However, it is up to the individual to "prove all things, and hold fast to that which is good" (I Thessalonians 5:21). The content of these resources does not necessarily reflect the views of CGG. They are provided for information purposes only.