1The LORD visited Sarah as he had said, and the LORD did for Sarah as he had spoken.2Sarah conceived and bore a son to Abraham in his old age, at the appointed time of which God had spoken to him.3Abraham called the name of his son, whom Sarah bore to him, Isaac.4Abraham circumcised his son Isaac, who was eight days old, just as God had commanded him.5And Abraham was a hundred years old when his son Isaac was born to him.6And Sarah said, "God has brought me laughter; everyone who hears will laugh with me."7And she said, "Who would have told Abraham that Sarah would nurse sons? For I have borne a son to him in his old age."