and Isaac was forty years old when he married Rebekah, the daughter of Bethuel the Aramean from Paddan-aram and the sister of Laban the Aramean.
We have here an account of the birth of Jacob and Esau, the twin sons of Isaac and Rebekah: their entrance into the world was (which is not usual) one of the most considerable parts of their story; nor is much related concerning Isaac but what had reference to his father while he lived and to his sons afterwards.
Commenting on Genesis 25:19-28
And Isaac was forty years old when he took Rebekah to wife,.... Which was three years after the death of his mother; Isaac was born when she was ninety, and therefore must be thirty seven when she died. The Jews say Rebekah was but fourteen, though it is highly probable she was older; who is described as the daughter of Bethuel the Syrian, of Padanaram...
HISTORY OF ISAAC. (Gen 25:19-34) these are the generations--account of the leading events in his life.
Commenting on Genesis 25:19-34