Musar על ברכות 113:4

When the author of this prayer speaks about the נבונים, this is a reference to the matriarchs; a mother is compared to someone with בינה. We are told in Berachot 57a that if someone dreams that he has slept with his mother he may look forward to insights and understanding. Our Kabbalists refer to בינה, insight, as אימא עילאה, "Mother Superior."