The LORD visited Sarah as he had said, and the LORD did to Sarah as he had promised.
And Sarah conceived, and bore Abraham a son in his old age at the time of which God had spoken to him.
Abraham called the name of his son who was born to him, whom Sarah bore him, Isaac.
And Abraham circumcised his son Isaac when he was eight days old, as God had commanded him.
Abraham was a hundred years old when his son Isaac was born to him.
And Sarah said, "God has made laughter for me; every one who hears will laugh over me."
And she said, "Who would have said to Abraham that Sarah would suckle children? Yet I have borne him a son in his old age."
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (Revised Standard Version - Holy Bible)