Genesis 21:8-10

American Standard Version

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 unto Abraham, ^[a]mocking. ¹⁰ Wherefore she said unto Abraham, Cast out this handmaid and her son: for the son of this handmaid shall not be heir with my son, even with Isaac.