Genesis 29:29-31 New Century Version (NCV)
29 (Laban gave his slave girl Bilhah to his daughter Rachel to be her servant.) 30 So Jacob had sexual relations with Rachel also, and Jacob loved Rachel more than Leah. Jacob worked for Laban for another seven years.
Jacob’s Family Grows
31 When the Lord saw that Jacob loved Rachel more than Leah, he made it possible for Leah to have children, but not Rachel.
Genesis 29:29-31 New International Version (NIV)
29 Laban gave his servant Bilhah to his daughter Rachel as her attendant. 30 Jacob made love to Rachel also, and his love for Rachel was greater than his love for Leah. And he worked for Laban another seven years.
31 When the Lord saw that Leah was not loved, he enabled her to conceive, but Rachel remained childless.