Yāska's Nirukta 1.17

1.17

atha api idam antareṇa pada vibhāgo na vidyate
``avasāya padvate rudra mṛḷe.''.(ṛV.X,169,1).iti
padvad avasam gāvaḥ pathyadanam avater gati arthasya aso nāma karaṇas tasmān na avagṛhṇanti
``ava sāya aśvān''.iti
syatir upasṛṣṭo vimocane tasmād avagṛhṇanti
``dūto nirṛtyā idam ā jagāma.''.(ṛV.X,165,1).iti
pañcamī artha prekṣā vā ṣaṣthī artha prekṣā vā āḥ kāra antam
``paro nirṛtyā ā cakṣva.''.(ṛV.X,164,1).iti caturthī artha prekṣā ai kāra antam
paraḥ samnikarṣaḥ saṃhitā
pada prakṛtiḥ saṃhitā
pada prakṛtīni sarva caraṇānām pārṣadāni
atha api yājñe daivatena bahavaḥ pradeśā bhavanti tad etena upekṣitavyam
te ced brūyur liṅgajñā atra sma iti
``.indram na tvā śavasā devatā vāyum pṛṇanti.''.(ṛV.V1,4,7;.Vṣ.33,13).iti
vāyu liṅgaṃś ca indra liṅgaṃś ca āgneye mantre
``.agnir iva manyo tviṣitaḥ sahasva.''.(ṛV.X,84,2).iti
tathā agnir mānyave mantre
tviṣito jvalitas tviṣir ity apy asya dīpti nāma bhavati
atha api jñāna praśaṃsā bhavaty ajñāna nindā ca