Dīkṣā-bhedaḥ (Types of Initiation) — Lalitopākhyāna: Hayagrīva–Agastya Dialogue
निर्गतं यद्गुरोर्वक्त्रात्सर्वं शास्त्रं तदुच्यते / निषिद्धमपि तत्कुर्याद्गुर्वाज्ञां नैव लङ्घयेत्
nirgataṃ yadgurorvaktrātsarvaṃ śāstraṃ taducyate / niṣiddhamapi tatkuryādgurvājñāṃ naiva laṅghayet
Whatever issues from the Guru’s mouth is called the whole of Śāstra. Even if it be something forbidden, one should do it; one must never transgress the Guru’s command.