Thematic Bible: The real heir born

And Jehovah visited Sarah as He had said. And Jehovah did to Sarah as He had spoken. For Sarah conceived and bore Abraham a son in his old age, at the set time of which God had spoken to him. And Abraham called the name of his son that was born to him (whom Sarah bore to him) Isaac. read more.
And Abraham circumcised his son Isaac when he was eight days old, as God had commanded him. And Abraham was a hundred years old when his son Isaac was born to him. And Sarah said, God has made me laugh, so that all who hear will laugh with me. And she said, Who could have said to Abraham, will Sarah suckle children? For I have borne a son to him in his old age.