Kautilya's Arthashastra 2.3.35

2.3.35

kāryāḥ kārmārikāḥ śūlā vedhanāgrāś ca veṇavaḥ /[ś]
uṣṭragrīvyo 'gnisamyogāḥ kupyakalpe ca yo vidhiḥ //[ś] E

In those canals, there shall be collected stones, spades (kuddála), axes (kuthári), varieties of staffs, cudgel (musrinthi), hammers (mudgara), clubs, discus, machines (yantra), and such weapons as can destroy a hundred persons at once (sataghni), together with spears, tridents, bamboo-sticks with pointed edges made of iron, camel-necks, explosives (agnisamyógas), and whatever else can be devised and formed from available materials.