Dīkṣā, Mantra-Types, Mantra-Doṣas, and Qualifications of Ācārya–Śiṣya
चतुःशताक्षरो मंत्रो वृद्ध इत्यभिधीयते । नवार्णस्तारसंयुक्तो मंत्रो निस्त्रिंश उच्यते ॥ ४१ ॥
catuḥśatākṣaro maṃtro vṛddha ityabhidhīyate | navārṇastārasaṃyukto maṃtro nistriṃśa ucyate || 41 ||
由四百音节组成之真言,称为“弗哩陀陀”(vṛddha,扩展之)真言。九音节之真言若与“多罗”(Tārā,即音节 oṃ)相合,则名为“尼斯特林沙”(nistriṃśa)真言。
Sanatkumara (teaching Narada in a technical Vedanga-style classification)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It gives a precise technical taxonomy of mantras by syllable-count and by the addition of Oṃ (Tārā), showing that mantra-śāstra treats sound-structure as spiritually consequential and ritually regulated.
Indirectly: it supports bhakti-practice by defining how mantras are properly formed and recognized, so that devotional japa and ritual recitation are performed with śāstric correctness.
Śikṣā (phonetics) and mantra-lakṣaṇa: counting akṣaras (syllabic units) and specifying the role of praṇava/Oṃ (Tārā) in forming a recognized mantra-type.