Let thy words be few. Ecclesiastes 5:2
Cast out this slave woman and her son,
because the son of a slave woman shall not be heir with my son Isaac.
11Abraham didn't want to abandon his son Ishmael.
12 But God said to Abraham,
Don't worry about Ishmael and Hagar.
Do what Sarah told you to do. Your seed will be Isaac's seed.
14 Abraham gave Hagar some bread and a bottle of water and sent her and Ishmael into the wilderness. 15 After the water ran out, Hagar put the little boy under a bush. 16 Then she went away, and said, "Let me not see his death." And she sat and wept.
17 God heard the little boy crying, and an angel called to Hagar from heaven, saying,
What's wrong with you, Hagar?
Don't be afraid. God has heard the voice of your little boy.
18 Get up and lift him up in your hand. I will make him a great nation.
Ishmael isn't mentioned by name in the text of Genesis 22. Instead, he is referred to as "the son of Hagar the Egyptian" (v.9), "the son of this bondwoman" (v.10), "the lad" (vv.12, 17-20), or "the child" (vv.14-26). But I used Ishmael's name in my summary of the text for the sake of clarity.
The Bible doesn't say much about Ishmael's life after he was abandoned by Abraham and Sarah, except to say that he died when he was 137 years old (Genesis 25:17).
Muslims believe that Ishmael, not Isaac, was the son that Allah told Abraham to sacrifice. And that Abraham and Ishmael traveled to Mecca to create the Kabba.
Jonathan Kirsch suggests in The Harlot by the Side of the Road that the "play" between Isaac and Ishmael may have been of a sexual nature, noting that the same word is used in Gen 26:8 to describe Isaac's fondling of Rebekah.