3. Abraham gave the name Isaac to the son Sarah had by him.
4. When his son Isaac was eight days old, Abraham circumcised him. He did it exactly as God had commanded him.
5. Abraham was 100 years old when his son Isaac was born to him.
6. Sarah said, "God has given laughter to me. Everyone who hears about this will laugh with me."
7. She continued, "Who would have said to Abraham that Sarah would nurse children? But I've had a son by him when he is old."
8. Isaac grew. The time came for his mother to stop nursing him. On that day Abraham had a big dinner prepared.