Genesis 29:31-34
31
Yahweh saw that Leah was hated, and he opened her womb, but Rachel was barren.
32
Leah conceived, and bore a son, and she named him Reuben. For she said, "Because Yahweh has looked at my affliction. For now my husband will love me."
33
She conceived again, and bore a son, and said, "Because Yahweh has heard that I am hated, he has therefore given me this son also." She named him Simeon.
34
She conceived again, and bore a son. Said, "Now this time will my husband be joined to me, because I have borne him three sons." Therefore was his name called Levi.