Genesis 28:9

28:9 So Esau went to Ishmael and married Mahalath, the sister of Nebaioth and daughter of Abraham’s son Ishmael, along with the wives he already had.

Genesis 17:18

17:18 Abraham said to God, “O that Ishmael might live before you!”

Genesis 17:26

17:26 Abraham and his son Ishmael were circumcised on the very same day.