Listening to Rabbanim

Where does it say in Torah Sh’Bichtav that we must refer to the Rabbanim, other than ‘lo taturu’, the karaim don’t listen to Torah Sh’Baal peh. Where in Torah sh’bichtav does it say we must?

Parshat Shoftim it says you must listen to the rabbis that interpret the Torah which is Torah Shebe’alpeh.

RABBI SHAY TAHAN