Shiva Purana
नाभिनन्दंति तद्वाक्यमुत्तरं च प्रयच्छति ॥ गुरुकर्मण्यसाध्यं यत्तदुपेक्षां करोति च ॥ १९ ॥
They do not welcome him and he gives them an answer He neglects what is impossible for the teacher to do.
english translation
nAbhinandaMti tadvAkyamuttaraM ca prayacchati ॥ gurukarmaNyasAdhyaM yattadupekSAM karoti ca ॥ 19 ॥
hk transliteration by Sanscript