Dīkṣā-bhedaḥ (Types of Initiation) — Lalitopākhyāna: Hayagrīva–Agastya Dialogue
बोधरूपं गुरुं प्राप्य न गुर्वन्तरमादिशेत् / गुरुक्तं परुषं वाक्यमाशिषं परिचिन्तयेत्
bodharūpaṃ guruṃ prāpya na gurvantaramādiśet / guruktaṃ paruṣaṃ vākyamāśiṣaṃ paricintayet
Having attained the Guru, who is the very form of awakening, one should not point to another teacher. Even the Guru’s harsh words should be contemplated as a blessing.