Kautilya's Arthashastra 14.2.34

14.2.34

pīlumayo maṇir agnigarbhaḥ suvarcalāmūlagranthiḥ sūtragranthir vā picupariveṣṭito mukhyād agnidhūmotsargaḥ //E

By keeping in the mouth a ball-like piece of pilu (careya arberea) or a knot of the root of linseed tree (suvarchala) with fire inserted within the mass of the ball and wound round with threads and cotton (pichu), volumes of smoke and fire can be breathed out.