Srimad-Bhagavatam: Canto 6 - Chapter 1 - Verse 11
Sanskrit:
अहो बत मयासाधु कृतं वै दभ्रबुद्धिना ।यन्मयैश्वर्यमत्तेन गुरु: सदसि कात्कृत: ॥ ११ ॥
ITRANS:
aho bata mayāsādhukṛtaṁ vai dabhra-buddhināyan mayaiśvarya-mattenaguruḥ sadasi kātkṛtaḥ
Translation:
Alas, what a regrettable deed I have committed because of my lack of intelligence and my pride in my material opulences. I failed to show respect to my spiritual master when he entered this assembly, and thus I have insulted him.