Pṛthivī-dohaṇa (The Milking of the Earth) and the Praise of King Pṛthu
एवं सर्गः समाख्यातश्चाक्षुषस्य समासतः / इत्येते षट् निसर्गाश्च क्रान्ता मन्वन्तरात्मकाः
evaṃ sargaḥ samākhyātaścākṣuṣasya samāsataḥ / ityete ṣaṭ nisargāśca krāntā manvantarātmakāḥ
Thus, in brief, the sarga of the Cākṣuṣa Manvantara has been declared. In this manner, these six nisarga—each of the nature of a Manvantara—have passed.