“בן זומא אומר, איזה הוא חכם--הלמד מכל אדם, שנאמר "מכל מלמדיי, השכלתי" (תהילים קיט,צט)

מסכת אבות פרק ד,א

Ben Zoma would say: Who is wise?
One who learns from every man.
As it is written: “From all my teachers I have grown wise, for Your testimonials are my meditation.
Ethics of the Fathers, Pirke Avot, 4:1”