16:1Now Sarai Abram's wife bare him no children: and she had an handmaid, an Egyptian, whose name was Hagar.

21:9And Sarah saw the son of Hagar the Egyptian, which she had born unto Abraham, mocking.

21:10Wherefore she said unto Abraham, Cast out this bondwoman and her son: for the son of this bondwoman shall not be heir with my son, even with Isaac.