Gen 30:9-13

9When Leah saw that she had ceased bearing children, she took her maid Zilpah and gave her to Jacob as a wife.10Then Leah's maid Zilpah bore Jacob a son.11And Leah said, “Good fortune!” so she named him Gad.12Leah's maid Zilpah bore Jacob a second son.13And Leah said, “Happy am I! For the women will call me happy”; so she named him Asher.