Rigvedabrahmana 5.1

5.1

iti caturtho 'dhyāyaḥ samāptaḥ
athātaścāturmāsyānāṃ cāturmāsyāni prayuñjānaḥ phālgunyāṃ paurṇamāsyāṃ prayuṅkte mukhaṃ vā etatsavatsarasya yatphālgunī paurṇamāsī mukhamuttare
phalgū pucchaṃ pūrve tadyathā vṛttasyāntau sametau syātāmevamevaitau saṃvatsarasyāntau sametau tadyatphālgunyāṃ paurṇamāsyāṃ vaiśvadevena yajate mukhata
eva tatsaṃvatsaraṃ prīṇātyatho bheṣajyayajñā vā ete yaccāturmāsyāni tasmādṛtusaṃdhiṣu prayujyanta ṛtusaṃdhiṣu hi vyādhirjāyate tāni vā aṣṭau
havīṃṣi bhavantyaṣṭau vai catasṛṇāṃ paurṇamāsīnāṃ havīṃṣi bhavanti catasṛṇāṃ
vai paurṇamāsīnāṃ vaiśvadevaṃ samāso 'tha yadagnirmathyate prajātirvai vaiśvadevaṃ
tasmādetaṃ daivaṃ garbhaṃ prajanayatyatha yatsaptadaśa sāmidhenyaḥ saddantāvājyabhāgau virājau saṃyājye tasyoktaṃ brāhmaṇamatha yannava prayājā navānuyājā
aṣṭau havīṃṣi vājinaṃ navamaṃ tannavatriyāṃ virājamāpnoti