Atharva Veda · Chapter 15.17

yo'sya prathamo vyānaḥ seyaṃ bhūmiḥ

yo'sya dvitīyo vyānastadantarikṣam

yo'sya tṛtīyo vyānaḥ sā dyauḥ

yo'sya caturtho vyānastāni nakṣatrāṇi

yo'sya pañcamo vyānasta ṛtavaḥ

yo'sya ṣaṣṭho vyānasta ārtavāḥ

yo'sya saptamo vyānaḥ sa saṃvatsaraḥ

samānamarthaṃ pari yanti devāḥ saṃvatsaraṃ vā etadṛtavo'nupariyanti vrātyaṃ ca

yadādityamabhisaṃviśantyamāvāsyāṃ caiva tatpaurṇamāsīṃ ca

ekaṃ tadeṣāmamṛtatvamityāhutireva