Genesis 21
2 Ref And Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him.
3 Ref And Abraham called the name of his son that was born unto him, whom Sarah bare to him, Isaac.
4 Ref And Abraham circumcised his son Isaac when he was eight days old, as God had commanded him.
5 Ref And Abraham was a hundred years old, when his son Isaac was born unto him.
6 Ref And Sarah said, God hath made me to laugh. Every one that heareth will laugh with me.
7 Ref And she said, Who would have said unto Abraham, that Sarah should give children suck? For I have borne him a son in his old age.