Thematic Bible: The real heir born

Jehovah was gracious to Sarah, as he had said. Jehovah did for Sarah what he had promised. Sarah became pregnant and bore a son to Abraham in his old age. It was at the very time God had promised him. Abraham gave the name Isaac (he laughs) to the son Sarah bore him. read more.
When his son Isaac was eight days old, Abraham circumcised him as God had commanded him. Abraham was a hundred years old when his son Isaac was born to him. Sarah said: God brought me laughter. Everyone who hears about this will laugh on account of me. She added: Who would have said to Abraham that Sarah would nurse children? Yet I have borne him a son in his old age.