Mantra-Māhātmya and Sādhana of Kārtavīryārjuna
Nyāsa, Yantra, Homa, and Dīpa-Vrata
दत्तात्रेयो मुनिश्चास्यच्छन्दोऽनुष्टुबुदाहृतम् । कार्तवीर्यार्जुनो देवो बीजशक्तिर्ध्रुवश्च हृत् ॥ १० ॥
dattātreyo muniścāsyacchando'nuṣṭubudāhṛtam | kārtavīryārjuno devo bījaśaktirdhruvaśca hṛt || 10 ||
Pour ce mantra/vidyā, le ṛṣi est le sage Dattātreya, et le mètre est déclaré Anuṣṭubh. La divinité présidante est Kārtavīryārjuna ; la semence (bīja) et la puissance (śakti) sont Dhruva ; et le hṛt (cœur) est le siège du nyāsa et de la méditation.
Narada (teaching in a technical Vedanga/Mantra-lakshana register, within the Narada–Sanatkumara dialogue frame)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: bhakti
It gives the classical mantra-lakṣaṇa framework—ṛṣi (seer), chandas (metre), devatā (deity), bīja–śakti, and hṛt (heart-locus)—showing that effective japa and worship require correct identification and inner placement, not mere recitation.
By naming the devatā and the heart (hṛt) as the locus, it points to devotion as both outward worship (to the presiding deity) and inward concentration—bhakti becomes focused remembrance anchored in the heart.
Chandas (metre) is explicitly taught via Anuṣṭubh, along with applied mantra-vidhi: assigning ṛṣi–chandas–devatā and using bīja/śakti and hṛdaya-nyāsa as part of ritual procedure.