Kommentar zu Tehillim 119:98

Each of Your commandments makes me wiser than my enemies Concerning Doeg and Ahithophel they [the Rabbis] said that their final conclusions did not agree with adopted practice. The secret of the Torah is in my hands forever, for I gained understanding from all my teachers; I learned a little from this one and I learned a little from that one (after I learned from my distinguished teacher).