3. And Abraham called the name of his son who was born to him, whom Sarah bore to him, Isaac.
4. And Abraham circumcised his son Isaac, being eight days old, as God had commanded him.
5. And Abraham was a hundred years old when his son Isaac was born to him.
6. And Sarah said, God has made me laugh: all that hear will laugh with me.
7. And she said, Who would have said to Abraham, Sarah will suckle children? For I have borne him a son in his old age.