Dīkṣā-bhedaḥ (Types of Initiation) — Lalitopākhyāna: Hayagrīva–Agastya Dialogue
लौकिकं वैदिकं वापि तथाध्यात्मिकमेव च / आददीत ततो ज्ञानं पूर्वं तमभिवादयेत्
laukikaṃ vaidikaṃ vāpi tathādhyātmikameva ca / ādadīta tato jñānaṃ pūrvaṃ tamabhivādayet
Whether worldly, Vedic, or truly spiritual, one should receive knowledge from him. And before taking that knowledge, one should first bow and pay reverence to the Guru.