Luke 1:13

But the angel said to him, "Do not be afraid, Zechariah, because your prayer has been heard, and your wife Elizabeth will bear you a son, and you must name him John.

Romans 9:8-9

That is, it is not Abraham's natural descendants who are God's children, but those who are made children by the promise are counted his true descendants.

Galatians 4:23

But the child of the slave girl was born in the ordinary course of nature, while the child of the free woman was born to fulfill the promise.

Galatians 4:28

Now we, brothers, like Isaac, are children born to fulfill the promise.

Treasury of Scripture Knowledge

Summary

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.

Bible References

Lo, sarah

Luke 1:13
But the angel said to him, "Do not be afraid, Zechariah, because your prayer has been heard, and your wife Elizabeth will bear you a son, and you must name him John.
Romans 9:8
That is, it is not Abraham's natural descendants who are God's children, but those who are made children by the promise are counted his true descendants.
Galatians 4:23
But the child of the slave girl was born in the ordinary course of nature, while the child of the free woman was born to fulfill the promise.