Genesis 30:9
When it was clear to Leah that she would have no more children for a time, she gave Zilpah, her servant, to Jacob as a wife.
Genesis 30:4
So she gave him her servant Bilhah as a wife, and Jacob went in to her.
Genesis 16:3
So after Abram had been living for ten years in the land of Canaan, Sarai took Hagar, her Egyptian servant, and gave her to Abram for his wife.
Genesis 29:35
And she was with child again, and gave birth to a son: and she said, This time I will give praise to the Lord: so he was named Judah; after this she had no more children for a time.
Genesis 30:17
And God gave ear to her and she became with child, and gave Jacob a fifth son.