Mahāviṣṇu-Mantras: Aṣṭākṣarī, Sudarśana-Astra, Nyāsa Systems, Āvaraṇa-Pūjā, and Prayogas
मंत्रार्णहृत्परायाद्यमात्मने हृदयांतिमम् । तत्तन्नाम समुच्चार्य्य न्यसेत्तत्तत्स्थले बुधः ॥ १९ ॥
maṃtrārṇahṛtparāyādyamātmane hṛdayāṃtimam | tattannāma samuccāryya nyasettattatsthale budhaḥ || 19 ||
ចាប់ពីអក្សរមន្ត្រ ហើយបន្តឡើងដល់បេះដូង; បន្ទាប់មក ដាក់អក្សរចុងក្រោយ នៅចុងតំបន់បេះដូង សម្រាប់អាត្មា។ ដោយបញ្ចេញនាមនីមួយៗតាមលំដាប់ អ្នកប្រាជ្ញគួរធ្វើ ន្យាស ដោយដាក់វានៅទីតាំងរបស់វា។
Narada
Vrata: none
Primary Rasa: shanta
Secondary Rasa: bhakti
It teaches nyāsa as an inner sanctification: mantra-syllables are not merely recited but consciously installed in specific loci—culminating in the heart—so the practitioner internalizes the deity/mantra as direct inner presence.
By directing the practice to the heart-region, it frames devotion as inward worship (mānasa/upāṃśu orientation), where recitation and placement make the heart the seat of the beloved form invoked by the mantra.
A technical ritual procedure (mantra-vidhi) is emphasized: correct sequencing of syllables, precise utterance (uccāra), and prescribed placement (nyāsa)—a hallmark of applied Vedic auxiliary disciplines used in worship.