Genesis 21:9-11

New Century Version

⁹ But Sarah saw Ishmael making fun of Isaac. (Ishmael was the son of Abraham by Hagar, Sarah’s Egyptian slave.) ¹⁰ So Sarah said to Abraham, “Throw out this slave woman and her son. Her son should not inherit anything; my son Isaac should receive it all.”

¹¹ This troubled Abraham very much because Ishmael was also his son.