Yāska's Nirukta 12.2

12.2

kiñcānyat,-“etadvai yajñasya samṛddhaṃ yadrūpasamṛddhaṃ yat karma kriyamāṇamṛgyajurvābhivadatīti ca brāhmaṇam|” etadeva hi yajñasya karmaṇaḥ samṛddham | tat kim iti ? ucyateyadrūpasamṛddham mantraliṅgairabhidhīyate, tadeva hi samastavṛddhyā yuktaṃ bhavati, netarat | etadeva sutarāṃ spaṣṭīkaroti-yat karma kriyamāṇamṛgyajurvābhivadatīti ca brāhmaṇam iti | śabdasāmānyād brāhmaṇaprāmāṇyāñceti ca śabdaḥ | brāhmaṇamapi ca mantrāṇāmarthavattvameva darśayati | anarthakā hi santaḥ kathaṃ karmābhivadeyuḥ ? kathaṃ vo'nabhivadantaḥ samarddhayeyuḥ ? arthavattvaṃ cobhyupagataṃ bhavatā brāhmaṇasya ‘athāpi brāhmaṇena rūpasampannā vidhīyante’ iti | atra brāhmaṇena siddhamevārthavattvamuktaṃ mantrāṇām | tadetadupadarśitamasmābhistasmādarthavanta eva mantrā iti |
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