[21:1] The Lord blessed Sarah, as he had promised,
[21:2] and she became pregnant and bore a son to Abraham when he was old. The boy was born at the time God had said he would be born.
[21:3] Abraham named him Isaac,
[21:4] and when Isaac was eight days old, Abraham circumcised him, as God had commanded.
[21:5] Abraham was a hundred years old when Isaac was born.
[21:6] Sarah said, “God has brought me joy and laughter. Everyone who hears about it will laugh with me.”
[21:7] Then she added, “Who would have said to Abraham that Sarah would nurse children? Yet I have borne him a son in his old age.”
[21:8] The child grew, and on the day that he was weaned, Abraham gave a great feast.