Luke 1:13

but the angel said to Zacharias, don't be afraid, Zacharias, for your prayer is heard: and your wife Elizabeth shall bear you a son, whom you shall name John:

Romans 9:8-9

that is, the children by natural descent are not thereby the children of God: but the children of the promise are alone considered as his posterity.

Galatians 4:23

he, who was of the bond-woman, was born according to the ordinary course of nature; but he, who was of the free-woman, was born by virtue of the promise.

Galatians 4:28

Now we, my brethren, as Isaac was, are the children of 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 Zacharias, don't be afraid, Zacharias, for your prayer is heard: and your wife Elizabeth shall bear you a son, whom you shall name John:
Romans 9:8
that is, the children by natural descent are not thereby the children of God: but the children of the promise are alone considered as his posterity.
Galatians 4:23
he, who was of the bond-woman, was born according to the ordinary course of nature; but he, who was of the free-woman, was born by virtue of the promise.