यज्ञप्रवर्तनम् (Yajña-pravartana) — The Institution/Commencement of Sacrifice in Dvāpara
ब्रह्मणस्तदहः प्रोक्तं रात्रिश्चैतावती स्मृता / अत्रार्जवं जडीभावो भूतानामायुगक्षयात्
brahmaṇastadahaḥ proktaṃ rātriścaitāvatī smṛtā / atrārjavaṃ jaḍībhāvo bhūtānāmāyugakṣayāt
This is declared to be Brahmā’s ‘day’, and a ‘night’ of equal measure is also remembered. Here, as the yuga wanes, beings fall into simplicity and inert dullness.