1 Chronicles 1:28
The sons of Abraham: Isaac and Ishmael.
Genesis 16:11-16
And the angel of the LORD said to her, "Behold, you are pregnant and shall bear a son. You shall call his name Ishmael, because the LORD has listened to your affliction.
Genesis 17:19-21
God said, "No, but Sarah your wife shall bear you a son, and you shall call his name Isaac. I will establish my covenant with him as an everlasting covenant for his offspring after him.
Genesis 21:2-5
And Sarah conceived and bore Abraham a son in his old age at the time of which God had spoken to him.
Genesis 21:9-10
But Sarah saw the son of Hagar the Egyptian, whom she had borne to Abraham, laughing.
Genesis 21:12
But God said to Abraham, "Be not displeased because of the boy and because of your slave woman. Whatever Sarah says to you, do as she tells you, for through Isaac shall your offspring be named.