4 Then Abraham circumcised his son Isaac when he was eight days old, as God had commanded him.
5 Now Abraham was one hundred years old when his son Isaac was born to him.
6 And Sarah said, “God has made me laugh. All who hear will laugh with me.”
7 Also she said, “Who would have said to Abraham that Sarah would nurse children? Yet I have borne him a son in his old age.”
8 So the child grew and was weaned. Then Abraham made a great feast the same day that Isaac was weaned.
9 Sarah saw the son of Hagar the Egyptian, whom she had borne to Abraham, mocking.
10 Therefore she said to Abraham, “Throw out this slave woman and her son, for the son of this slave woman shall not be heir with my son, Isaac.”