Srimad-Bhagavatam: Canto 7 - Chapter 1 - Verse 3
Sanskrit:
छन्दांस्यधीयीत गुरोराहूतश्चेत् सुयन्त्रित: ।उपक्रमेऽवसाने च चरणौ शिरसा नमेत् ॥ ३ ॥
ITRANS:
chandāṁsy adhīyīta gurorāhūtaś cet suyantritaḥupakrame ’vasāne cacaraṇau śirasā namet
Translation:
Being called by the spiritual master, the student should study the Vedic mantras regularly. Every day, before beginning his studies and at the end of his studies, the disciple should respectfully offer obeisances unto the spiritual master.