1 Chronicles 1:28
The sons of Abraham: Isaac and Ishmael.
Genesis 16:11-16
And the angel of Yahweh said to her: "Behold, you are pregnant and shall have a son. And you shall call his name Ishmael, for Yahweh has listened to your suffering.
Genesis 17:19-21
And God said, "No, but Sarah your wife shall bear a son for you, and you shall call his name Isaac. And I will establish my covenant with him as an everlasting covenant to his offspring after him.
Genesis 21:2-5
And she conceived, and Sarah bore to Abraham a son in his old age at the appointed time that God had told him.
Genesis 21:9-10
And Sarah saw the son of Hagar the Egyptian, whom she had borne Abraham, mocking.
Genesis 21:12
Then God said to Abraham, "{Do not be displeased} on account of the boy and on account of the slave woman. {Listen to everything that Sarah said to you}, for through Isaac [your] offspring will be named.