Genesis 29:31-34

And when the LORD saw that Leah was hated, he opened her womb: but Rachel was barren. And Leah conceived, and bare a son, and she called his name Reuben: for she said, Surely the LORD hath looked upon my affliction; now therefore my husband will love me. And she conceived again, and bare a son; and said, Because the LORD hath heard that I was hated, he hath therefore given me this son also: and she called his name Simeon. And she conceived again, and bare a son; and said, Now this time will my husband be joined unto me, because I have born him three sons: therefore was his name called Levi.