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 (This is the length of the life of Ishmael, one hundred thirty-seven years; he breathed his last and died, and was gathered to his people.)
18 They settled from Havilah to Shur, which is opposite Egypt in the direction of Assyria; he settled down alongside of 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 married Rebekah, daughter of Bethuel the Aramean of Paddan-aram, sister of Laban the Aramean.
21 Isaac prayed to the Lord for his wife, because she was barren; and the Lord granted his prayer, and his wife Rebekah conceived.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.