Mahāviṣṇu-Mantras: Aṣṭākṣarī, Sudarśana-Astra, Nyāsa Systems, Āvaraṇa-Pūjā, and Prayogas
हृदंतोऽयं महामंत्रो द्विशतार्णः समीरितः । जैमिनिर्मुनिरस्योक्तश्छंदश्चामितमीरितम् ॥ १५५ ॥
hṛdaṃto'yaṃ mahāmaṃtro dviśatārṇaḥ samīritaḥ | jaiminirmunirasyoktaśchaṃdaścāmitamīritam || 155 ||
ഈ മഹാമന്ത്രം ‘ഹൃത്’ അക്ഷരത്തിൽ അവസാനിക്കുന്നതു (ഹൃദന്ത) എന്നു പറയപ്പെടുന്നു; ഇത് ഇരുനൂറ് അക്ഷരങ്ങളുള്ളതായും പ്രസ്താവിക്കുന്നു. ഇതിന്റെ ഋഷി ജൈമിനി മുനി, ഛന്ദസ് അമിതം (അപരിമിതം) എന്നു കീര്ത്തിക്കുന്നു.
Narada (teaching in a Vedanga/Chandas-oriented context, traditionally within the Narada–Sanatkumara dialogue frame)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It emphasizes that a mantra is not only devotional sound but also a Vedic science: its ending, syllable-count, seer (ṛṣi), and metre (chandas) are part of its sanctity and correct transmission.
Bhakti here is supported by precision: devotion becomes steady and fruitful when the mantra is preserved and recited according to its recognized Vedic identifiers (ṛṣi and chandas), ensuring faithful continuity of the tradition.
Chandas and Śikṣā/Vyākaraṇa-style technical markers are highlighted—syllable/phoneme count (dviśatārṇa), mantra-ending (hṛd-anta), and the assignment of ṛṣi and chandas used for correct recitation and ritual application.