Passage cross-references.

Now these are the generations of Ishmael, Abraham’s son, whom Hagar the Egyptian, Sarah’s handmaid, bare unto Abraham:

And the angel of the LORD said unto her, Behold, thou art with child, and shalt bear a son, and shalt call his name Ishmael; because the LORD hath heard thy affliction.

And Abraham said unto God, O that Ishmael might live before thee!

And as for Ishmael, I have heard thee: Behold, I have blessed him, and will make him fruitful, and will multiply him exceedingly; twelve princes shall he beget, and I will make him a great nation.

And Ishmael his son was thirteen years old, when he was circumcised in the flesh of his foreskin. …

And Sarah saw the son of Hagar the Egyptian, which she had born unto Abraham, mocking. …

And his sons Isaac and Ishmael buried him in the cave of Machpelah, in the field of Ephron the son of Zohar the Hittite, which is before Mamre;

Then went Esau unto Ishmael, and took unto the wives which he had Mahalath the daughter of Ishmael Abraham’s son, the sister of Nebajoth, to be his wife.

Come, and let us sell him to the Ishmeelites, and let not our hand be upon him; for he is our brother and our flesh. And his brethren were content.

The sons of Abraham; Isaac, and Ishmael.

For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman. …