Oh here it spells it out more. Hilchos TT Perek 5
“There is no greater honor than that due a teacher, and no greater awe than that due a teacher. Our Sages declared: “Your fear of your teacher should be equivalent to your fear of Heaven.”
Therefore, they said: Whoever disputes the authority of his teacher is considered as if he revolts against the Divine Presence, as implied [by Numbers 26:9]: “…who led a revolt against God.”
Whoever engages in controversy with his teacher is considered as if he engaged in controversy with the Divine Presence, as implied [by Numbers 20:13]: “…where the Jews contested with God and where He was sanctified.”
Whoever complains against his teacher is considered as if he complains against the Divine Presence, as implied [by Exodus 16:8]: “Your complaints are not against us, but against God.”
Whoever thinks disparagingly of his teacher is considered as if he thought disparagingly of the Divine Presence, as implied [by Numbers 21:5]: “And the people spoke out against God and Moses.”