Then one spoke up and said, “I will return about this time next year, when your wife Sarah will certainly have a son.” Sarah overheard it, for she was at the tent door not far behind him.
God said, “Listen to me. I promise that you and Sarah will have a son, and you will call him Isaac. I will confirm my everlasting covenant of love with him and his seed.
I will wonderfully bless her, and I will certainly give you a son through her. Yes, I will bless her greatly, and she will become a mother of nations; kings of nations will arise among her children!”
Ishmael, the son of the slave girl, was born of the natural realm. But Isaac, the son of the freewoman, was born supernaturally by the Spirit—a child of the promise of God!
But the angel reassured him, saying, “Don’t be afraid, Zechariah! God is showing grace to you. For I have come to tell you that your prayer for a child has been answered. Your wife, Elizabeth, will bear you a son and you are to name him John.