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Galatians 4:23
Now the son by the servant-woman has his birth after the flesh; but the son by the free woman has his birth through the undertaking of God.

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Galatians 4:22
Because it is in the Writings, that Abraham had two sons, one by the servant-woman, and one by the free woman.

Romans 9:7
And they are not all children because they are the seed of Abraham; but, In Isaac will your seed be named.

Romans 9:8
That is, it is not the children of the flesh, but the children of God's undertaking, who are named as the seed.

Romans 9:9
For this is the word of God's undertaking, At this time will I come, and Sarah will have a son.

Romans 4:16
For this reason it is of faith, so that it may be through grace; and so that the word of God may be certain to all the seed; not only to that which is of the law, but to that which is of the faith of Abraham, who is the father of us all,

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Genesis 18:10
And he said, I will certainly come back to you in the spring, and Sarah your wife will have a son. And his words came to the ears of Sarah who was at the back of the tent-door.

Genesis 17:19
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.

Romans 4:19
And not being feeble in faith though his body seemed to him little better than dead (he being about a hundred years old) and Sarah was no longer able to have children:

Genesis 21:1
And the Lord came to Sarah as he had said and did to her as he had undertaken.

Genesis 21:2
And Sarah became with child, and gave Abraham a son when he was old, at the time named by God.

Genesis 17:16
And I will give her a blessing so that you will have a son by her: truly my blessing will be on her, and she will be the mother of nations: kings of peoples will be her offspring.

Genesis 18:14
Is there any wonder which the Lord is not able to do? At the time I said, in the spring, I will come back to you, and Sarah will have a child.

Hebrews 11:11
And by faith Sarah herself had power to give birth, when she was very old, because she had faith in him who gave his word;

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