Kautilya's Arthashastra 2.21.23

2.21.23

teṣām anyatamasyānayane bahir evocchulko vikrayaḥ //

When a person imports such forbidden articles as weapons (sastra), mail armour, metals, chariots, precious stones, grains and cattle, he shall not only be punished as laid down elsewhere, but also be made to forfeit his merchandise. When any of such commodities has been brought in for sale, they shall be sold, free of toll far outside (the fort).