John Gill - Exposition
John Gill
Abraham begat Isaac,.... The descent of Christ from Abraham is in the line of Isaac; Abraham begat Ishmael before Isaac, and others after him, but they are not mentioned; because the Messiah was not to spring from any of them, but from Isaac, of whom it is said, "in Isaac shall thy seed be called", Genesis 21:12 and who, as he was a progenitor, so an eminent type of Christ; being Abraham's only...