Genesis 16:3-4

3So, after Abram ahad lived ten years in the land of Canaan, Sarai, Abram’s wife, took Hagar the Egyptian, her servant, and gave her to Abram her husband as a wife. 4And he went in to Hagar, and she conceived. And when she saw that she had conceived, bshe looked with contempt on her mistress.
Hebrew her mistress was dishonorable in her eyes; similarly in verse 5

Genesis 16:8

8And he said, “Hagar, servant of Sarai, where have you come from and where are you going?” She said, “I am fleeing from my mistress Sarai.”

Genesis 16:15-16

15And Hagar bore Abram a son, and Abram called the name of his son, whom Hagar bore, Ishmael. 16Abram was eighty-six years old when Hagar bore Ishmael to Abram.

Genesis 21:9-13

9But Sarah dsaw the son of Hagar the Egyptian, whom she had borne to Abraham, elaughing.
Possibly  laughing in mockery
10So she said to Abraham, g“Cast out this slave woman with her son, for the son of this slave woman shall not be heir with my son Isaac.” 11And the thing was very displeasing to Abraham on account of his son. 12But God said to Abraham, “Be not displeased because of the boy and because of your slave woman. Whatever Sarah says to you, do as she tells you, for hthrough Isaac shall your offspring be named. 13And I will make ia nation of the son of the slave woman also, because he is your offspring.”

Genesis 25:12

12These are the generations of Ishmael, Abraham’s son, jwhom Hagar the Egyptian, Sarah’s servant, bore to Abraham.
Copyright information for ESV