Genesis 25:19

19 These also are the generations of Isaac the son of Abraham: Abraham begot Isaac:

Genesis 25:19 Meaning and Commentary

Genesis 25:19

And these [are] the generations of Isaac, Abraham's son
Moses, having given the genealogy of Ishmael and his posterity, returns to Isaac, the other son of Abraham, with whom and his children the following part of his history is chiefly, if not altogether concerned: Abraham begat Isaac;
for the further confirmation of his being his proper legitimate son this clause is added.

Genesis 25:19 In-Context

17 And the years of Ismael’s life were a hundred and thirty-seven, and decaying he died, and was gathered unto his people.

18 And he dwelt from Hevila as far as Sur, which looketh towards Egypt, to them that go towards the Assyrians. He died in the presence of all his brethren.

19 These also are the generations of Isaac the son of Abraham: Abraham begot Isaac:

20 Who when he was forty years old, took to wife Rebecca the daughter of Bathuel the Syrian of Mesopotamia, sister to Laban.

21 And Isaac besought the Lord for his wife, because she was barren: and he heard him, and made Rebecca to conceive.