Mantra-Māhātmya and Sādhana of Kārtavīryārjuna
Nyāsa, Yantra, Homa, and Dīpa-Vrata
सुवर्णादिकृतां रम्यां शलाकां षोडशांगुलाम् । तदर्द्धां वा तदर्द्धां वा सूक्ष्माग्रां स्थूलमूलिकाम् ॥ ७९ ॥
suvarṇādikṛtāṃ ramyāṃ śalākāṃ ṣoḍaśāṃgulām | tadarddhāṃ vā tadarddhāṃ vā sūkṣmāgrāṃ sthūlamūlikām || 79 ||
One should use a pleasing śalākā (probe) made of gold or the like, sixteen finger-breadths in length—or else half of that (or half again)—with a fine, pointed tip and a thicker base.
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It stresses precision and purity in sacred technical acts—proper materials, correct measure (aṅgula), and careful design—so that a ritual or Vedic procedure is performed without defect.
Bhakti is supported by disciplined practice: when devotional rites are performed with care and correctness, the practitioner’s reverence becomes concrete through orderly, faultless action.
Measurement and procedural exactness (aṅgula-based sizing and instrument design) typical of Vedanga-linked ritual/technical instruction—how to specify and prepare a tool for correct application.