Pirkei Avot §avot_01_06: Joshua ben Perahiah and Nittai the Arbelite received [the oral tradition] fro...

Joshua ben Perahiah and Nittai the Arbelite received [the oral tradition] from them. Joshua ben Perahiah used to say: appoint for thyself a teacher, and acquire for thyself a companion and judge all men with the scale weighted in his favor.