Dīkṣā-bhedaḥ (Types of Initiation) — Lalitopākhyāna: Hayagrīva–Agastya Dialogue
प्रणामश्चेति विख्यातैः प्रीणयेत्त्रिपुरांबिकाम् / अथ पुष्पाञ्जलिं दद्यात्सहस्राक्षरविद्यया
praṇāmaśceti vikhyātaiḥ prīṇayettripurāṃbikām / atha puṣpāñjaliṃ dadyātsahasrākṣaravidyayā
By the well-known acts such as praṇāma (reverent prostration) and the rest, one should gladden Tripurāmbikā; then one should offer a handful of flowers with the Sahasrākṣarī-vidyā (the thousand-syllabled mantra).