Chandahsutra 1.9

1.9

iha hi traivarṇikānāṃ sāṅgavedādhyayanamāmnāyate (gha) | arthāva-
bodhaparyyantaścādhyayanavidhiḥ | (ka) vedāṅgañca chandaḥ | tatastadadhyayanaṃ vidhibodhitatvādanuṣṭheyam | atha anuṣṭubhā yajati, bṛhatyā gāyati, gāyatryā stautītyevamādiśravaṇādarthāyāptamanuṣṭubādijñānam | kiñca chandasāmaparijñānāt pratyuta pratyavāyaḥ śrūyate | yathā—“yo ha vā aviditārṣeyacchandodaivataviniyogena (kha) brāhmaṇena mantreṇa yājayati vā'dhyāpayati vā sa sthāṇuṃ varcchati garttaṃ vā padyate pramīyate vā pāpīyān bhavati yātayāmānyasya chandāṃsi bhavanti” (ga) iti | tasmācchandaḥparijñānaṃ karttavyam | tadarthamidaṃ śāstramārabhyate | tatra laghunopāyena śāstrāvabodhasiddhyarthaṃ saṃjñāḥ paribhāṣate sūtrakāraḥ |—