Genesis 29:24
And Laban gave Zilpah his female servant to her, to Leah his daughter [as] a female servant.
Genesis 30:9-12
When Leah saw that she had ceased bearing children, she took Zilpah her female servant and gave her to Jacob as a wife.
Genesis 16:1
Now Sarai, the wife of Abram, had borne him no children. And she had a female Egyptian servant, and her name [was] Hagar.
Genesis 24:59
So they sent away Rebekah their sister, and her nurse, and the servant of Abraham and his men.
Genesis 46:18
There [are] the sons of Zilpah, whom Laban gave to Leah his daughter, and she bore these to Jacob--sixteen persons.