Genesis 18:10

Luke 1:13

But the angel said to him, "Do not be afraid, Zechariah, for your petition has been heard: and your wife Elizabeth will bear you a son, and you are to call his name John.

Romans 9:8-9

In other words, it is not the children by natural descent who count as God's children, but the children made such by the promise are regarded as Abraham's posterity.

Galatians 4:23

But we see that the child of the slave-girl was born in the common course of nature; but the child of the free woman in fulfilment of the promise.

Galatians 4:28

But you, brethren, like Isaac, are children born in fulfilment of a promise.

Treasury of Scripture Knowledge

Summary

Genesis 18:10

And he said, I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him.

Lo, sarah

Luke 1:13

Romans 9:8

Galatians 4:23

Bible References

Lo, sarah

But the angel said to him, "Do not be afraid, Zechariah, for your petition has been heard: and your wife Elizabeth will bear you a son, and you are to call his name John.

In other words, it is not the children by natural descent who count as God's children, but the children made such by the promise are regarded as Abraham's posterity.

But we see that the child of the slave-girl was born in the common course of nature; but the child of the free woman in fulfilment of the promise.