"And God said unto Abraham, Let it not be grievous in thy sight because of the lad [Ishmael] and because of the bondwoman [Hagar];
. . . . . . . . . .; for in Isaac shall thy seed be called. And also for the bondwoman will I make a nation, because he is thy seed."
Genesis 27:12-13

Abraham's wife, Sarah, convinced Abraham to have a child with her handmaid Hagar.

She was impatient and wanted her husband to have a child. After Hagar conceived, Sarah was jealous and hated her.

Hagar fled into the wilderness where an angel of the Lord said, "I will multiply your seed exceedingly, , You are with child and shall
bear a son and shall call him Ishmael; because the Lord has heard your affliction."
Genesis 16:10-11