Genesis 29:30-35

So Jacob had sexual relations with Rachel also, and Jacob loved Rachel more than Leah. Jacob worked for Laban for another seven years. When the LORD saw that Jacob loved Rachel more than Leah, he made it possible for Leah to have children, but not Rachel. Leah became pregnant and gave birth to a son. She named him Reuben, because she said, “The LORD has seen my troubles. Surely now my husband will love me.” Leah became pregnant again and gave birth to another son. She named him Simeon and said, “The LORD has heard that I am not loved, so he has given me this son.” Leah became pregnant again and gave birth to another son. She named him Levi and said, “Now, surely my husband will be close to me, because I have given him three sons.” Then Leah gave birth to another son. She named him Judah, because she said, “Now I will praise the LORD.” Then Leah stopped having children.