When Rachel realized that she could bear Jacob no children, Rachel became jealous of her sister and said to Jacob, "Give me children! If you don’t, I may as well be dead."
Jacob was angry at Rachel and said, "Do you think I’m God? God alone has kept you from giving birth!"
She said, "Here’s my servant Bilhah. Sleep with her, and she will give birth for me. Because of her, I will also have children." So Rachel gave her servant Bilhah to Jacob as his wife, and he slept with her. Bilhah became pregnant and gave birth to a son for Jacob. Rachel said, "God has judged in my favor, heard my voice, and given me a son." So she named him Dan. Rachel’s servant Bilhah became pregnant again and gave birth to a second son for Jacob. Rachel said, "I’ve competed fiercely with my sister, and now I’ve won." So she named him Naphtali.
When Leah realized that she had stopped bearing children, she took her servant Zilpah and gave her to Jacob as his wife. Leah’s servant Zilpah gave birth to a son for Jacob, and Leah said, "What good luck!" So she named him Gad. Leah’s servant Zilpah gave birth to a second son for Jacob, and Leah said, "I’m happy now because women call me happy." So she named him Asher.