Ecclesiastes Rabbah 2:9

¹“I grew great, and increased more than all who were before me in Jerusalem; my wisdom, too, was sustained in me” (Ecclesiastes 2:9). “I grew great, and increased more than all who were before me in Jerusalem” – who was before him in Jerusalem? Was it not David his father? Four were called a maneh son of a half- maneh : is one hundred dinars. This is a metaphor for a great person whose father was unremarkable. On, son of Pelet; the son of Tzipor; the son of Beor; and Hezekiah. Two were a maneh son of a maneh : Son of Ikesh and Solomon. “My wisdom, too, was sustained in me” – Rabbi Aḥa said that Solomon said: All the Torah that I studied in my adulthood dissipated; [the Torah that I studied] in my youth was sustained in me.