1 Chronicles 1:28
The sons of Abraham: Isaac and Ishmael.
Genesis 16:11-16
And the angel of the LORD yet said unto her, Behold, thou art with child and shalt bear a son and shalt call his name Ishmael, because the LORD has heard thy affliction.
Genesis 17:19-21
And God said, Sarah thy wife shall bear thee a son indeed, and thou shalt call his name Isaac (laughter); and I will confirm my covenant with him for an everlasting covenant and with his seed after him.
Genesis 21:2-5
For Sarah conceived and bore Abraham a son in his old age at the set time of which God had spoken to him.
Genesis 21:9-10
And Sarah saw the son of Hagar the Egyptian, whom she had born unto Abraham, mocking.
Genesis 21:12
Then God said unto Abraham, Let it not be grievous in thy sight because of the lad and because of thy bondwoman; in all that Sarah has said unto thee, hearken unto her voice; for in Isaac shall thy seed be called.