Genesis 15:4
Then behold, the word of the Lord came to him, saying, “This man [Eliezer] will not be your heir but he who shall come from your own body shall be your heir.”
Genesis 17:16
I will bless her, and indeed I will also give you a son by her. Yes, I will bless her, and she shall be a mother of nations; kings of peoples will come from her.”
Genesis 21:12
God said to Abraham, “Do not let it distress you because of Ishmael and your maid; whatever Sarah tells you, listen to her and do what she asks, for your descendants will be named through Isaac.
2 Samuel 7:12
When your days are fulfilled and you lie down [in death] with your fathers (ancestors), I will raise up your descendant after you, who shall be born to you, and I will establish his kingdom.
2 Samuel 16:11
Then David said to Abishai and to all his servants, “Look, my son [Absalom] who came from my own body, is seeking my life; how much more [reason] now [does] this Benjamite [have to curse me]? Let him alone and let him curse, for [it could be that] the Lord has told him [to do it].
2 Chronicles 32:21
And the Lord sent an angel who destroyed every brave warrior, commander, and officer in the camp of the king of Assyria. So the king returned to his own land in shame. And when he entered the house (temple) of his god, some of his own children killed him there with the sword.
Galatians 4:28
And we, [believing] brothers and sisters, like Isaac, are children [not merely of physical descent, like Ishmael, but are children born] of promise [born miraculously].