Adhyaya 8: Yogasthanas, Ashtanga Yoga, Pranayama-Siddhi, and Shiva-Dhyana leading to Samadhi
नाभेरधस्ताद्वा विद्वान् ध्यात्वा कमलमुत्तमम् त्र्यङ्गुले चाष्टकोणं वा पञ्चकोणमथापि वा
nābheradhastādvā vidvān dhyātvā kamalamuttamam tryaṅgule cāṣṭakoṇaṃ vā pañcakoṇamathāpi vā
విద్వాన్ సాధకుడు నాభి క్రింద పరమ కమలాన్ని ధ్యానించి, అక్కడ మూడు అంగుళాల ప్రమాణముతో అష్టకోణం గాని పంచకోణం గాని యంత్రరూపంగా భావించాలి।
Suta Goswami (narrating Shiva-oriented worship instructions within the Linga Purana discourse)
It links external Linga-puja to inner upasana by prescribing a specific dhyana-seat (below the navel) and a measured yantra-form, showing that worship of Pati (Shiva) is stabilized through disciplined visualization.
Shiva-tattva is approached as the inner focus of consciousness: the devotee (pashu) turns inward to a purified locus and form, loosening pasha (bondage) through ordered contemplation directed to Pati.
A Pashupata-leaning dhyana practice: meditating on the navel-lotus and installing a geometric mandala (octagon or pentagon) with precise measure (three finger-breadths) as part of Shiva-upasana.