Adhyaya 328
Chandaḥ-sāra (Essence of Prosody) — Gāyatrī as the Root Metre and Syllabic Expansions
续说韵律学（chandas-adhikāra）时，火神阿耆尼宣示：伽耶特丽（Gāyatrī）为吠陀格律之根本母式，可作一音节的种子（bīja）形态、十五音节的真言形态，亦可作与生主（Prajāpatya）相应的八音节形态来观修。又说明其音节度量随吠陀用法而异：祭词（Yajus）为六，娑曼歌咏（Sāman）为十二，梨俱颂（Ṛg）为十八，并立规：娑曼之式每次增展加二。继而给出程序法则：ṛc 的度量可再作“第四”增量；Prajāpatya 以四为单位扩展；其余格律逐一递增，而 Āturyā 则独须依次删减。阿耆尼又立扩展格律的正统次第——Uṣṇik、Anuṣṭubh、Vṛhatī、Paṅkti、Triṣṭubh、Jagatī——皆为伽耶特丽的层层展开，并称其具婆罗门（brahman）之性，从而使格律之学成其神圣。章末给出记谱书写法：常式“ 三与三 ”的分组，单元称 Āryā，以及梨俱与祭词的技术名目，须写入六十四词的方格之中。
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Frequently Asked Questions
It codifies Gāyatrī’s multiple syllabic forms and gives rule-based procedures for metrical expansion across Vedic contexts (Yajus/Sāman/Ṛc), including special increment and omission rules (Prajāpatya by fours; Āturyā by sequential subtraction).
By identifying metrical order as brahmanic in nature, it frames disciplined speech-measure (chandas) as a dharmic practice—aligning recitation, cognition, and ritual precision with a sacred cosmological structure.