Atharvavedabrahmana 7.15

7.15

atha yaccaturviṃśamaharupaityānupetya viṣuvantaṃ mahāvratamupeyāt
kathamanākūtyai bhavatīti yamevāmuṃ purastādviṣuvato'tirātramupayanti
tenetibrūyādabhiplavāt pṛṣṭyo nirbhitaḥ, pṛṣṭyādabhijit, abhijitaḥ
svarasāmānaḥ, svarasāmabhyo viṣuvān, viṣuvataḥ svarasāmānaḥ, svarasāmabhyo viśvajit, viśvajitaḥ pṛṣṭābhiplavau, pṛṣṭābhiplavābhyāṃ
gavāyuṣo, gavāyubhyāṃ dvādaśarātro'tha hṛdevebhyo mahāvrataṃ na tasthe kathamūrddhaiḥ stomairviṣuvantamapāgātāṃ hattairmāmiti te devā dṛṣṭa sāmmivāsuratna taṃ yajñakratuṃ jānomo ya ūrddhastomo yenaitadaharavāpnuyāmeti tata
etaṃ dvādaśarātramūrddhastomaṃ dadṛśustamāharaṃstenāyajanta tata ebhyo'tiṣṭhattiṣṭhati hāsmai mahāvrataṃ mahāvrataṃ pratiṣṭhati pratitiṣṭhati
prajayā paśubhirya evaṃ veda sa vā eṣa saṃvatsaraḥ