ध्यानयज्ञः, संसार-विष-निरूपणम्, पाशुपतयोगः, परा-अपरा विद्या, चतुर्वस्था-विचारः (अध्यायः ८६)
आकण्ठं वह्नितत्त्वं स्याल् ललाटान्तं द्विजोत्तमाः वायव्यं वै ललाटाद्यं व्योमाख्यं वा शिखाग्रकम्
ākaṇṭhaṃ vahnitattvaṃ syāl lalāṭāntaṃ dvijottamāḥ vāyavyaṃ vai lalāṭādyaṃ vyomākhyaṃ vā śikhāgrakam
诸最胜二生者,当观至喉为火之本原;至额尽处为风之本原;而于顶轮当安立名为空(以太、空间)的本原,如是于身中安排列诸真理,以奉事湿婆。
Suta Goswami (narrating Śaiva ritual teaching to the sages of Naimiṣāraṇya)
It teaches inner preparation (bhūta-śuddhi/tattva-nyāsa): before external pūjā of the Liṅga, the sādhaka aligns the body as a purified field by installing elemental tattvas in specific regions, making the worship fit for Pati (Śiva).
By ordering fire, air, and ether upward through the body, the verse points to ascent from grosser to subtler principles, culminating in vyoma (space), a doorway to the all-pervasive, subtle presence of Śiva beyond pasha-bound limitations of the pashu.
Tattva-nyāsa as part of bhūta-śuddhi—an internal yogic-ritual mapping where agni is set up to the throat, vāyu to the forehead, and vyoma at the crown, supporting Śaiva dhyāna and Liṅga-pūjā.