Genesis 25:19

19 Here is the history of Yitz'chak, Avraham's son. Avraham fathered Yitz'chak.

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 how long Yishma'el lived: 137 years. Then he breathed his last, died and was gathered to his people.

18 Yishma'el's sons lived between Havilah and Shur, near Egypt as you go toward Ashur; he settled near all his kinsmen.

19 Here is the history of Yitz'chak, Avraham's son. Avraham fathered Yitz'chak.

20 Yitz'chak was forty years old when he took Rivkah, the daughter of B'tu'el the Arami from Paddan-Aram and sister of Lavan the Arami, to be his wife.

21 Yitz'chak prayed to ADONAI on behalf of his wife, because she was childless. ADONAI heeded his prayer, and Rivkah became pregnant.