TSK · Genesis 18:10

And I will bless her, and give thee a son also of her: yea, I will bless her, and she shall be [a mother] of nations; kings of people shall be of her.

But my covenant will I establish with Isaac, which Sarah shall bear unto thee at this set time in the next year.

For Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him.

And the angel of the LORD appeared unto the woman, and said unto her, Behold now, thou [art] barren, and bearest not: but thou shalt conceive, and bear a son.

But the angel said unto him, Fear not, Zacharias: for thy prayer is heard; and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.

But he [who was] of the bondwoman was born after the flesh; but he of the freewoman [was] by promise.