Yāska's Nirukta 10.3

10.3

``āsasrānāsaḥ śavasānam accha indram sucakre rathyāso aśvāh/
abhi śrava ṛjyanto vaheyur nū cin nu vāyor amṛtam vi dasyet/''.
āsasṛvāṃsas abhibalāyamānam indram kalyāṇa cakre rathe yogāya rathyā aśvā rathasya vodhāp,.ṛjyanta ṛju gāminas annam abhivaheyur navaṃś ca purānaṃś ca/
śrava ity anna nāma,.śrūyata iti satah/
vāyoś ca asya bhakṣo yathā na vidasyed iti/
indra pradhānā ity eke,.naighaṇṭukam vāyu karma/
ubhaya pradhānā ity aparam/
varuṇo vṛṇoti iti satah/
tasya eṣā bhavati/
[ṣk pt.4,p.4:.varuṇah/
antarikṣe udakasya āvaranād vāyur eva.]