चतुर्युगाख्यान (Caturyuga-Ākhyāna) — Yuga-wise Origins and Measurements of Beings
गत्यर्थादृषतेर्धातोर्नाम निर्वृतिरादितः / यस्मादेव स्वयं भूतस्तस्माच्चाप्यृषिता स्मृता
gatyarthādṛṣaterdhātornāma nirvṛtirāditaḥ / yasmādeva svayaṃ bhūtastasmāccāpyṛṣitā smṛtā
From the root ṛṣ, bearing the sense of movement, the name “nirvṛti” was first spoken; and because he came to be of himself, he is also remembered as “ṛṣitā”.