One of the fourteen ratnas (precious and unique animate and inanimate objects) of the Cakravarti (universal sovereign);
the shield of a Cakravarti, which serves as a boat in water. It has also a supernatural power, on account of which the seeds which are sown in the morning in an area of 12 Yojanas (1Yojana= 7.88 miles) x 12 Yojanas get ripe by the midday.
tae ṇaṃ se divve kammakaraṇe suseṇasenāvaiṇā parāmuṭṭhe samāṇe khippāmeva ṇāvābhūe jāe yāvi hotthā.
(Jam 3.80)
carmaratnaṃ - dvādaśayojanāyāmavistāraṃ prātaruptāparāhnasampannopabhogyaśālyādisampattikaram.
(Prasā 1214 Vr Pa 350)