अधोलोकवर्णनम् (Adholoka-varṇana) — Description of the Lower Worlds and Cosmographic Measures
पर्यासपरिमाणं तु चन्द्रादित्यौ प्रकाशतः / पर्यास्तात्पारिमाण्येन भूमेस्तुल्यं दिवं स्मृतम्
paryāsaparimāṇaṃ tu candrādityau prakāśataḥ / paryāstātpārimāṇyena bhūmestulyaṃ divaṃ smṛtam
By the measure of the circle illumined by the Moon and the Sun, according to that very measure the heaven (diva) is remembered as equal to the earth.