Genesis 21:1-7 - The Birth Of Isaac
1 Jehovah was gracious to Sarah, as he had said. Jehovah did for Sarah what he had promised. 2 Sarah became pregnant and bore a son to Abraham in his old age. It was at the very time God had promised him. 3 Abraham gave the name Isaac (he laughs) to the son Sarah bore him. 4 When his son Isaac was eight days old, Abraham circumcised him as God had commanded him. 5 Abraham was a hundred years old when his son Isaac was born to him.
6 Sarah said: God brought me laughter. Everyone who hears about this will laugh on account of me. 7 She added: Who would have said to Abraham that Sarah would nurse children? Yet I have borne him a son in his old age.