अधोलोकवर्णनम् (Adholoka-varṇana) — Description of the Lower Worlds and Cosmographic Measures
इडावत्सरस्तृतीयस्तु चतुर्थश्चानुवत्सरः / पञ्चमोवत्सरस्तेषां कालस्तु युगसंहितः
iḍāvatsarastṛtīyastu caturthaścānuvatsaraḥ / pañcamovatsarasteṣāṃ kālastu yugasaṃhitaḥ
The third is iḍāvatsara, and the fourth is anuvatsara. The fifth is vatsara; the time comprising them is gathered together as a ‘yuga’.