ललितोपाख्याने जप-न्यास-योगप्रकरणम्
Lalitopākhyāna: Procedure of Japa, Nyāsa, and Yogic Installation
व्यक्तैः कारमसूक्ष्मस्थूलशरीराणि कल्पयेत् / नाभौ हृदि भ्रुवोर्मध्ये बालाबीजान्यथ न्यसेत्
vyaktaiḥ kāramasūkṣmasthūlaśarīrāṇi kalpayet / nābhau hṛdi bhruvormadhye bālābījānyatha nyaset
With the manifest letters, let him fashion—according to the kāra—the subtle body and the gross body. Then let him place the “Bālā” seed-syllables at the navel, the heart, and the space between the brows.