In Context

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 being eight days old, as God had commanded him.

5 And Abraham was an hundred years old, when his son Isaac was born to him.

6 And Sarah said, God has made me to laugh, so that all that hear will laugh with me.

7 And she said, Who would have said to Abraham, that Sarah should have given children suck? for I have born him a son in his old age.

Genesis 21:5 in Other Translations