Pṛthivy-Āyāma-Vistara (Extent of the Earth) and Jambūdvīpa–Navavarṣa Description
मण्डलेन प्रमाणेन त्र्यस्रे मानं तदिष्यते / चत्वारिंशत्सहस्राणि योजनानां समन्ततः
maṇḍalena pramāṇena tryasre mānaṃ tadiṣyate / catvāriṃśatsahasrāṇi yojanānāṃ samantataḥ
By the measure of the maṇḍala, the extent of the tri-angled form is declared; on every side it spans forty thousand yojanas.