Manusmriti

siva.sh/manusmriti/2/199

नौदाहरेदस्य नाम परोक्षमपि केवलम् । न चैवास्यानुकुर्वीत गतिभाषितचेष्टितम् ॥ १९९ ॥

sanskrit

Let him not pronounce the mere name of his teacher (without adding an honorific title) behind his back even, and let him not mimic his gait, speech, and deportment.

english translation

naudAharedasya nAma parokSamapi kevalam | na caivAsyAnukurvIta gatibhASitaceSTitam || 199 ||

hk transliteration by Sanscript