Genesis 21:9-10
Genesis 21:9-10 AMP
Now [as time went on] Sarah saw [Ishmael] the son of Hagar the Egyptian, whom she had borne to Abraham, mocking [Isaac]. [Gal 4:29] Therefore she said to Abraham, “Drive out this maid and her son, for the son of this maid shall not be an heir with my son Isaac.” [Gal 4:28-31]