Genesis 29:30-34

30Jacob also went to Rachel and indeed loved Rachel more than Leah. So he served with him for yet another seven years.

31Now Adonai saw that Leah was unloved, so he opened her womb; but Rachel was unable to conceive.

32Leah became pregnant and gave birth to a son and named him Reuben because she said, “For Adonai has seen my affliction. Surely now my husband will love me.”

33Then she became pregnant again and gave birth to a son, and said, “For Adonai heard that I am hated, so He’s given me this one also,” and she named him Simeon.

34Then she became pregnant again and gave birth to a son, and said, “Now this time my husband will join himself to me because I’ve given birth to three sons for him.” For this reason he was named Levi.