Adhyaya 48 — The Emanation of Beings from Brahma: Night, Day, Twilight, and the Orders of Creation
सामानि जगतीच्छन्दः स्तोमं पञ्चदशं तथा ।
वैरूपमतिरात्रञ्च निर्ममे पश्चिमान्मुखात् ॥
sāmāni jagatī-chandaḥ stomaṃ pañcadaśaṃ tathā | vairūpam atirātrañ ca nirmame paścimān mukhāt ||
From his western face he fashioned the Sāman chants, the Jagatī metre, the fifteenfold stoma, and also the Vairūpa (stoma/chant-form) and the Atirātra (overnight Soma rite).
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The text treats ritual complexity (including night-long rites) as woven into creation itself, implying that sustained discipline and ordered worship mirror cosmic order.
Sarga: it continues the account of origination of Vedic structures and sacrificial forms.
Jagatī and Sāman suggest expansive ‘world-measure’ and melodic resonance; the Atirātra points to continuity of awareness beyond day-night duality in sacrificial symbolism.