Galatians 4:23
Howbeit the'son by the handmaid is born after the flesh; but the'son by the freewoman is born through promise.
Hebrews 11:11
By faith even Sarah herself received power to conceive seed when she was past age, since she counted him faithful who had promised:
Genesis 18:10-14
And he said, I will certainly return unto thee when the season cometh round; and, lo, Sarah thy wife shall have a son. And Sarah heard in the tent door, which was behind him.
Genesis 21:1-2
And Jehovah visited Sarah as he had said, and Jehovah did unto Sarah as he had spoken.
Romans 9:7-8
neither, because they are Abraham's seed, are they all children: but, In Isaac shall thy seed be called.
Genesis 17:15-19
And God said unto Abraham, As for Sarai thy wife, thou shalt not call her name Sarai, but Sarah shall her name be.
Romans 4:18-21
Who in hope believed against hope, to the end that he might become a father of many nations, according to that which had been spoken, So shall thy seed be.
Romans 10:8
But what saith it? The word is nigh thee, in thy mouth, and in thy heart: that is, the word of faith, which we preach:
Galatians 4:28-29
Now we, brethren, as Isaac was, are children of promise.