Manusmriti
गुरोर्यत्र परिवादो निन्दा वाऽपि प्रवर्तते । कर्णौ तत्र पिधातव्यौ गन्तव्यं वा ततोऽन्यतः ॥ २०० ॥
Wherever (people) justly censure or falsely defame his teacher, there he must cover his ears or depart thence to another place.
english translation
guroryatra parivAdo nindA vA'pi pravartate । karNau tatra pidhAtavyau gantavyaM vA tato'nyataH ॥ 200 ॥
hk transliteration by Sanscript