Parsha Vayetzei – Chapter 30 – Verse 1
In this verse it says that Rachel was jealous of Leah, but how could the righteous Rachel be jealous? Rashi says clearly, she was jealous of her good deeds. Rachels said to herself it is only because Leah is more righteous of me, that I am not worthy of children. I am not on such a high level; therefore, I don’t have any children.