Yuga-Vibhāga and Kāla-Pramāṇa
Measures of Time and the Four Yugas
व्यामे नैवोछ्रयो यस्य सम ऊर्द्धं तु देहिनः / समोछ्रयपरीणाहो ज्ञेयो न्यग्रोधमण्डलः
vyāme naivochrayo yasya sama ūrddhaṃ tu dehinaḥ / samochrayaparīṇāho jñeyo nyagrodhamaṇḍalaḥ
That whose breadth and height above the body are equal, and whose height and girth are likewise equal—know that as the Nyagrodha-maṇḍala.