नाभेरधस्ताद्वा विद्वान् ध्यात्वा कमलमुत्तमम् त्र्यङ्गुले चाष्टकोणं वा पञ्चकोणमथापि वा
nābheradhastādvā vidvān dhyātvā kamalamuttamam tryaṅgule cāṣṭakoṇaṃ vā pañcakoṇamathāpi vā
على السالك الحكيم أن يتأمل اللوتس الأسمى تحت السُّرّة، وهناك يتفكّر في هيئةٍ يَنترية—إمّا مثمّنًا أو خماسيًّا—بمقدار ثلاثِ عُروضِ أصابع.
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.