Shiva Purana — Vayaviya Samhita, Shloka 35
न्यासत्रैविध्य-भूतशुद्धि-प्रक्रिया
Threefold Nyāsa and the Procedure of Elemental Purification
पश्चात्त्रयोःदशकलाः पायुमेढ्रोरुजानुषु । जंघास्फिक्कटिपार्श्वेषु वामदेवस्य भावयेत् । घ्राणे शिरसि बाह्वोश्च कल्पयेत्कल्पवित्तमः । अष्टत्रिंशत्कलान्यासमेवं कृत्वानुपूर्वशः
paścāttrayoḥdaśakalāḥ pāyumeḍhrorujānuṣu | jaṃghāsphikkaṭipārśveṣu vāmadevasya bhāvayet | ghrāṇe śirasi bāhvośca kalpayetkalpavittamaḥ | aṣṭatriṃśatkalānyāsamevaṃ kṛtvānupūrvaśaḥ
其后，通晓仪轨者应依次观想十三种卡拉（kalā），安置于肛门、生殖器、两股与双膝；于小腿、臀部、腰际与两胁，当观想婆摩提婆（Vāmadeva）之临在。又当将（诸卡拉）安置于鼻、头与双臂。如是按次第完成三十八卡拉之安置（nyāsa），行者循序渐进而行。
Suta Goswami (narrating the Vāyavīya teachings to the sages at Naimisharanya)
Tattva Level: pashu
Shiva Form: Vāmadeva
Shakti Form: Pārvatī
Role: nurturing
FAQs
It teaches kalā-nyāsa—an inner consecration where the aspirant mentally installs Śiva’s divine powers in the body, making the body a purified seat for worship, mantra, and realization of Pati (Śiva) beyond pasha (bondage).
Nyāsa is a Saguna method: by assigning Śiva’s aspects (here highlighting Vāmadeva) to limbs and centers, the devotee internalizes the Liṅga-worship—turning external ritual into inward adoration that leads toward the Nirguna truth.
A sequential kalā-nyāsa meditation: visualize and “place” the specified kalās in the listed body-points, especially contemplating Vāmadeva in the legs/hips/waist/sides, as preparation for mantra-japa and deeper Śaiva yoga.