1 Chronicles 1:28
The sons of Abraham: Isaac and Ishmael.
Genesis 16:11-16
And the angel of the Lord said, See, you are with child and will give birth to a son, to whom you will give the name Ishmael, because the ears of the Lord were open to your sorrow.
Genesis 17:19-21
And God said, Not so; but Sarah, your wife, will have a son, and you will give him the name Isaac, and I will make my agreement with him for ever and with his seed after him.
Genesis 21:2-5
And Sarah became with child, and gave Abraham a son when he was old, at the time named by God.
Genesis 21:9-10
And Sarah saw the son of Hagar the Egyptian playing with Isaac.
Genesis 21:12
But God said, Let it not be a grief to you because of the boy and Hagar his mother; give ear to whatever Sarah says to you, because it is from Isaac that your seed will take its name.