ललितोपाख्याने जप-न्यास-योगप्रकरणम्
Lalitopākhyāna: Procedure of Japa, Nyāsa, and Yogic Installation
मूलाद्याज्ञावसानेषु वर्गाष्टकमथो न्यसेत् / शषसान्मूर्ध्नि संन्यस्य स्वरानेष्वेव विन्यसेत्
mūlādyājñāvasāneṣu vargāṣṭakamatho nyaset / śaṣasānmūrdhni saṃnyasya svarāneṣveva vinyaset
From the mūlādhāra up to the culmination at the ājñā, one should place the eight consonant-classes (varga-aṣṭaka); then set «śa ṣa sa» upon the crown of the head, and arrange the vowels in their proper order.