Rasarnava 10.32

10.32

pāradasya trayo doṣā viṣaṃ vahnirmalas tathā
viṣeṇa saviṣaṃ vidyāt vahnau kuṣṭhī bhavennaraḥ
malenodararogī syāt mriyate ca rasāyane //

There are three impurities of mercury: poison, fire, and dross. / By poison, know it to be poisonous; in fire, a man becomes afflicted with leprosy; / by dross, one becomes sick with abdominal disease, and one dies in rejuvenating alchemy.