Genesis 21:12
God said to Abraham: Do not be upset about the boy and your slave. Listen to what Sarah says, because through Isaac your descendants will carry on your name.
Hebrews 11:18
It was said: In Isaac your descendants will be called.
Genesis 17:19
God replied: Yes, but your wife Sarah will bear you a son! You will call him Isaac. I will establish my covenant with him as a long lasting covenant for his descendants after him.
Genesis 17:21
But my covenant I will establish with Isaac. Sarah will bear him to you by this time next year.
1 Samuel 8:7
Jehovah answered: Samuel, do everything they want you to do. I am really the one they have rejected as their king.
1 Samuel 8:9
Listen to them. But be sure to warn them and tell them about the behavior and rights of a king who rules over them.
Isaiah 46:10
I make known the end from the beginning, from ancient times, what is still to come. I say: 'My purpose will stand, and I will do all that I please.'
Romans 9:7-8
It is not because they are Abraham's that they are all children, but: What will be called 'your seed' will be through Isaac. (Genesis 21:12)