TSK · Genesis 18:10

I will bless her and will give you a son through her. I will bless her and she will become a mother of nations. Kings of countries will come from her!”

But I will establish my covenant with Isaac, whom Sarah will bear to you at this set time next year.”

So Sarah became pregnant and bore Abraham a son in his old age at the appointed time that God had told him.

The LORD’s angel appeared to the woman and said to her,“You are infertile and childless, but you will conceive and have a son.

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

But one, the son by the slave woman, was born by natural descent, while the other, the son by the free woman, was born through the promise.