Genesis 30:9-12

ISV(i) 9 When Leah saw that she had stopped bearing children, she took her woman servant Zilpah and gave her to Jacob as a wife. 10 Leah’s servant Zilpah bore a son to Jacob, 11 and Leah exclaimed, “How fortunate!” So she named him Gad.
12 Later, Leah’s servant Zilpah bore a second son for Jacob.