Nirukta, Phonetic Variants, and Vedic Dhātu–Svara Taxonomy
सुप्तिङुपग्रहलिंगनराणां कालहलूचूस्वरकर्तृयडां च । व्यत्ययमिच्छति शास्रकृदेषां सोऽपि च सिद्ध्यति बाहुलकेन ॥ ८ ॥
suptiṅupagrahaliṃganarāṇāṃ kālahalūcūsvarakartṛyaḍāṃ ca | vyatyayamicchati śāsrakṛdeṣāṃ so'pi ca siddhyati bāhulakena || 8 ||
સુપ્ (નામ-વિભક્તિ), તિઙ્ (ક્રિયા-પ્રત્યય), ઉપગ્રહ (ઉપસર્ગ), લિંગ તથા નર/કર્તા, તેમજ કાળ, હ-લુ-ચૂ અક્ષરો, સ્વર, કર્તૃ અને યડ્—આમાં શાસ્ત્રકાર જો વ્યત્યય ઇચ્છે, તો તે પણ બહુલ પ્રચલનના આધારથી સિદ્ધ ગણાય છે।
Sanatkumara (teaching Narada in a Vedanga/śāstra context)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
It frames śāstra as both rule-governed and usage-aware: disciplined learning (especially Vedāṅgas like Vyākaraṇa and Śikṣā) supports clarity in Vedic study, which in turn aids right understanding on the path of dharma and mokṣa.
Indirectly: accurate speech, chanting, and comprehension depend on grammar and accent; such correctness strengthens mantra-recitation and scriptural hearing (śravaṇa), which are foundational supports for sustained Viṣṇu-bhakti even when the verse itself is technical.
Vyākaraṇa and Śikṣā: it notes that grammatical authorities may allow substitutions and irregular forms, and that these can be accepted when backed by prevalent usage (bāhulaka), including matters of endings (suP/tiṅ) and Vedic accent (svara).