One verse

Srimad Bhagavatam 10.80.41

10.80.41

एतदेव हि सच्छिष्यै: कर्तव्यं गुरुनिष्कृतम् । यद् वै विशुद्धभावेन सर्वार्थात्मार्पणं गुरौ ॥ ४१ ॥

etad eva hi sac-chiṣyaiḥ kartavyaṁ guru-niṣkṛtam yad vai viśuddha-bhāvena sarvārthātmārpaṇaṁ gurau

etat
this
eva
alone
hi
certainly
sat
true
śiṣyaiḥ
by disciples
kartavyam
to be done
guru
to the spiritual master
niṣkṛtam
repayment of one’s debt
yat
which
vai
indeed
viśuddha
completely pure
bhāvena
with an attitude
sarva
of all
artha
assets
ātmā
and one’s body
arpaṇam
the offering
gurau
to one’s spiritual master

This indeed is the duty of all true disciples: to repay the debt to their spiritual master by offering him, with pure hearts, their wealth and even their very lives.