Luke 1:13-20

But the angel said to him: " Do not be afraid, Zechariah; your prayer has been heard, and your wife Elizabeth shall bear you a son, whom you shall call by the name John.

Romans 9:6-9

Not that God's Word has failed. For it is not all who are descended from Israel who are true Israelites;

Galatians 4:28-31

As for ourselves, brothers, we, like Isaac, are children born in fulfillment of a promise.

Treasury of Scripture Knowledge

Summary

And God said, Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his seed after him.

General references

Bible References

General references

Luke 1:55
(As he promised to our forefathers) For Abraham and his race for ever."