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, thou art with child, and shalt bear a son, and shalt call his name Ishmael; because the LORD hath 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: and I will establish 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, which she had borne to Abraham, mocking.
Genesis 21:12
And God said to Abraham, Let it not be grievous in thy sight, because of the lad, and because of thy bond-woman; in all that Sarah hath said to thee, hearken to her voice: for in Isaac shall thy seed be called.