One verse

Srimad Bhagavatam 7.12.3

7.12.3

छन्दांस्यधीयीत गुरोराहूतश्चेत् सुयन्त्रित: । उपक्रमेऽवसाने च चरणौ शिरसा नमेत् ॥ ३ ॥

chandamsy adhiyita guror ahutas cet suyantritah upakrame ’vasane ca caranau sirasa namet

chandamsi
mantras in the Vedas, like the Hare Krsna maha-mantra and the Gayatri mantra
adhiyita
one should chant or read regularly
guroh
from the spiritual master
ahutah
being addressed or called (by him)
cet
if
su-yantritah
faithful, well-behaved
upakrame
in the beginning
avasane
at the end (of reading Vedic mantras)
ca
also
caranau
at the lotus feet
sirasa
by the head
namet
one should offer obeisances

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.