Genesis 21:1-7

1The Lord graciously remembered and visited Sarah as He had said, and the Lord did for her as He had promised.

2So Sarah conceived and gave birth to a son for Abraham in his old age, at the appointed time of which God had spoken to him.

3Abraham named his son Isaac (laughter), the son to whom Sarah gave birth.

4So Abraham circumcised his son Isaac when he was eight days old, just as God had commanded him.

5Abraham was a hundred years old when his son Isaac was born.

6Sarah said, “God has made me laugh; all who hear [about our good news] will laugh with me.”

7And she said, “Who would have said to Abraham that Sarah would nurse children? For I have given birth to a son by him in his old age.”