Genesis 21:1-7 - The Birth Of Isaac
1 And Jehovah visited Sarah as He had said. And Jehovah did to Sarah as He had spoken. 2 For Sarah conceived and bore Abraham a son in his old age, at the set time of which God had spoken to him. 3 And Abraham called the name of his son that was born to him (whom Sarah bore to him) Isaac. 4 And Abraham circumcised his son Isaac when he was eight days old, as God had commanded him. 5 And Abraham was a hundred years old when his son Isaac was born to him.
6 And Sarah said, God has made me laugh, so that all who hear will laugh with me. 7 And she said, Who could have said to Abraham, will Sarah suckle children? For I have borne a son to him in his old age.