Saṃkhyāvarta (संख्यावर्त्त): Commencement of Yajña at the Dawn of Tretāyuga
कालाख्यायां प्रवृत्तायां प्रप्ते त्रेतायुगे तदा / औषधीषु च जातासु प्रवृत्ते वृष्टिसर्जने
kālākhyāyāṃ pravṛttāyāṃ prapte tretāyuge tadā / auṣadhīṣu ca jātāsu pravṛtte vṛṣṭisarjane
When the reckoning of Time set forth and the Tretāyuga arrived, medicinal herbs sprang forth, and the sending of rains commenced.