Agnibheda–Vaṃśa: Forms of Agni, Their Functions, and Progeny (अग्निभेद-वंशः)
इत्येते पावकस्याग्नेः पुत्रा एव प्रकीर्त्तिताः / ततः शुचिस्तु वै सौरो गन्धर्वैरायुराहुतः
ityete pāvakasyāgneḥ putrā eva prakīrttitāḥ / tataḥ śucistu vai sauro gandharvairāyurāhutaḥ
Thus these are proclaimed as the sons of Agni Pāvaka. Thereafter comes Śuci, of solar nature, whom the Gandharvas invoke by the name Āyu.