1 The Lord was attentive to Sarah just as he had said, and the Lord carried out just what he had promised her.
2 She became pregnant and gave birth to a son for Abraham when he was old, at the very time God had told him.
3 Abraham named his son—the one Sarah bore him—Isaac.
4 Abraham circumcised his son Isaac when he was eight days old just as God had commanded him.
5 Abraham was 100 years old when his son Isaac was born.