Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 63

Sanskrit:

इत्युक्तो गुरुरप्याह कुपितो याह्यलं त्वया ।विप्रावमन्त्रा शिष्येण मदधीतं त्यजाश्विति ॥ ६३ ॥

ITRANS:

ity ukto gurur apy āhakupito yāhy alaṁ tvayāviprāvamantrā śiṣyeṇamad-adhītaṁ tyajāśv iti

Translation:

Addressed thus, the spiritual master Vaiśampāyana became angry and said: Go away from here! Enough of you, O disciple who insults brāhmaṇas! Furthermore, you must immediately give back everything I have taught you.

Purport:

Śrī Vaiśampāyana was angry because one of his disciples, Yājñavalkya, was insulting the other disciples, who were, after all, qualified brāhmaṇas. Just as a father is disturbed when one son mistreats the father’s other children, the spiritual master is very displeased if a proud disciple insults or mistreats the guru’s other disciples.