Genesis 30

Rachel envies her sister, Leah's fertility. Both sisters compete to produce the most children. Leah has already birthed four sons, and Rachel has none. Envious, Rachel gives her maid, Bilhah, to Jacob to produce a child. Bilhah has two children. Leah now gets envious because she has not conceived in some time. Leah gives Jacob her maid, Zilpah to produce two children. Leah gets pregnant three more times. Rachel births Joseph.