यज्ञप्रवर्तनम् (Yajña-pravartana) — The Institution/Commencement of Sacrifice in Dvāpara
एको वेदश्चतुष्पाद्धि त्रेतास्विह विधीयते / संक्षयादायुपश्चैव व्यस्यते द्वापरेषु च
eko vedaścatuṣpāddhi tretāsviha vidhīyate / saṃkṣayādāyupaścaiva vyasyate dvāpareṣu ca
The Veda is truly one; yet in the Tretā age it is ordained here as fourfold. And as the span of life declines, in the Dvāpara age it is divided and arranged.