Manasara 14.12

14.12

uragabandhaṃ caturvidham
adhiṣṭhānasya tuṅgaṃ tu sāṣṭāṃśadaśāṃśakaṃ kṛte
saptāṃśaṃ vapratuṅgaṃ tu kumudoccaṃ rasāṃśakam

The Fourfold Uragabandha: / When the height of the plinth base is divided into eighteen parts: / seven parts are for the height of the lower plinth, and the height of the torus is six parts;