1. The Lord was gracious to Sarah, just as he had said he would be. He did for Sarah what he had promised to do.
2. Sarah became pregnant. She had a son by Abraham when he was old. He was born at the exact time God had promised him.
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.