Genesis 25:19

19 These are the descendants of Isaac, Abraham's son: Abraham was the father of 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 (These are the years of the life of Ish'mael, a hundred and thirty-seven years; he breathed his last and died, and was gathered to his kindred.)

18 They dwelt from Hav'ilah to Shur, which is opposite Egypt in the direction of Assyria; he settled over against all his people.

19 These are the descendants of Isaac, Abraham's son: Abraham was the father of Isaac,

20 and Isaac was forty years old when he took to wife Rebekah, the daughter of Bethu'el the Aramean of Paddan-aram, the sister of Laban the Aramean.

21 And Isaac prayed to the LORD for his wife, because she was barren; and the LORD granted his prayer, and Rebekah his wife conceived.