Genesis 21:1-7

1The Lord came to Sarah as he had said, and the Lord did for Sarah what he had promised.

2Sarah became pregnant and bore a son to Abraham in his old age, at the appointed time God had told him.

3Abraham named his son who was born to him — the one Sarah bore to him — Isaac.

4When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.

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

6Sarah said, “God has made me laugh, and everyone who hears will laugh with me.”

7She also said, “Who would have told Abraham that Sarah would nurse children? Yet I have borne a son for him in his old age.”