Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 41

Sanskrit:

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

ITRANS:

etad eva hi sac-chiṣyaiḥkartavyaṁ guru-niṣkṛtamyad vai viśuddha-bhāvenasarvārthātmārpaṇaṁ gurau

Translation:

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.

Purport:

One engages one’s body to realize one’s purposes. The body is also the basis of the material conception of “I,” while one’s fortune is the basis of the conception of “mine.” Thus by offering everything to the spiritual master, one realizes one’s self to be an eternal servant of the Lord. The spiritual master does not exploit the disciple but rather engages him fully in Kṛṣṇa consciousness for the disciple’s eternal benefit.