TSK · Genesis 29:24

Now Sarai, Abram's wife, bore him no children. She had a handmaid, an Egyptian, whose name was Hagar.

When Leah saw that she had finished bearing, she took Zilpah, her handmaid, and gave her to Jacob as a wife.

These are the sons of Zilpah, whom Laban gave to Leah, his daughter, and these she bore to Jacob, even sixteen souls.