Genesis 21:7-9

Darby Translation

⁷ And she said, Who would have said to Abraham, Sarah will suckle children? For I have borne [him] a son in his old age.

⁸ And the child grew, and was weaned. And Abraham made a great feast on the day that Isaac was weaned.

⁹ And Sarah saw the son of Hagar the Egyptian, whom she had borne to Abraham, mocking.