Genesis 30
9 Ref 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.
10 And Zilpah, Leah's servant, gave birth to a son.
11 Ref And Leah said, It has gone well for me: and she gave him the name Gad.
12 And Zilpah, Leah's servant, gave birth to a second son.